Is Time Travel Possible? | The Science of Doctor Who | Doctor Who
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- čas přidán 23. 01. 2015
- Is Time Travel really Possible? In this clip Professor Brian Cox - a confirmed Doctor Who fan - undertakes an experiment to see. Subscribe: bit.ly/SubscribeToDoctorWho
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Time Travel is totally possible as I just threw my watch across the room.
LOL
Sums it up quite nicely.
good luck lol
good luck mon the hoops
FBI HERE
and when he returned after 10 years and was now 2050 he still had to quarantine for 10 days
1) He returned in 2042.
2) No, he very likely wouldn't have to.
Maybe he should stay out a few minutes longer and come back 10 days later still, hey presto, no need to quarantine
@@medusa8617 that attempt at a joke just came across as person displaying a painfully obvious sign of complete ignorance to humor, and a slight taste of politics. Even if I’m entirely wrong, you still shot the bed on this one.
@@medusa8617 What??. You're the most boring person on the planet :D
He would have to take 2 covid shot and 10 booster shots and there would still be mask and social distancing, including the QR code check in.
Absolutely brilliant how he can describe the most complex material so simply.
Let's hangout and give the time we have left, more life.
🩸🩸🩸
What do we want??
TIME TRAVEL!!!
When do we want it??
IRRELEVANT!!!!
Well played =)
14 years ago?
Brilliant
14 years ago are you still alive
Wait I’m stupid nvm
End of this video shocked me.!!!
what end?
yay, it scared me
Why is it shocking? He said that time travel into the future is possible, and then there was something else on the screen, but I don't remember what it was.
What end? The fact it's possible?
all videos uploaded by doctor who have an ending like that
Great demonstration of how time travel really is possible!
czcams.com/video/PkKAHroBTtA/video.html
It actually is possible by something called the occult
it isn’t possible. us humans won’t ever get there
Citrus people said that about getting to the moon
@@colonyofrats4193 true but the moon was closer and by the way the world is heading seems like we’re gonna have to take care of personal problems first
This fella is the business. So down to earth, yet so hyper intelligent and humble. He would be the person I would most like to have a conversation with in the world.
The bartender said "We don't serve time travellers here".
A time traveller walked into a bar...
Thomas M took me a while to get it. Too bad most people didn’t understand this joke ದ್ದದ
Noice
@@burcopresents predestination?
Predestination reference?
fizzle bomber
Plot Twist: Brian Cox is a time lord in real life.
***** it's a joke
AdomkXG Only Jesus is Lord of all.Cox claims to be Lord of evolution...Itself without either logic, evidence or scientific veracity.
@Brian Sherwin What are you babbling about? Are you sure that Pedro isn't "Lord of all"? How about Manolo? Maybe Miguel... For a religitard to say that Evolution has no evidence or scientific veracity, is like a preacher saying there is a god. In other words, it's a rank lie, with the intention of manipulating people so that they can be controlled.
Take your religion somewhere else, and don't foist it on those of us who are scientifically-literate and intellectually superior. We're too smart to fall for the "invisible magic man in the sky" trick.
AdomkXG Rubbish! He just loves the limelight on here and TV; instead of doing his job.
AdomkXG Time travel is absolutely useless. It is just a fantasy dream made up by sci fi authors. Is it possible? Yes. Is it relevant? Absolutely not. Any intelligent species would realize that time travel is in fact a huge “waste” of time. Just stepping on a blade of grass the wrong way in a past time warp could result in an extinction of an entire galaxy. Not that it definitely would, but it could. There is a Russian game that exemplifies this outcome, it’s called Russian roulette. In fact even talking about the future in a past reality will actually alter that realities future, just talking about it. Time is fluid, constantly changing, the present is the only way to ensure a longevity of existence. Time travel isn’t interesting, and is more dangerous than eating a nuclear missile with your bare hands.
I like that the Doctor Who channel doesn't ask you to subscribe at the end.
That didn't age well
Same!
I admire his way he explains this. One of the first times I've read about this with an attempt to actually understand it I did it in my own language, for simplisity sake. But I think that Brian Cox' power for us to understand this is that he gives us visualisation to understand what he wants to teach us.
That and his humor simply made me laugh. :)
If the observer and time traveler used mechanical watches their time would be the same even if one traveled across the universe and back. If light is a measurement of time then Earth is traveling in the future of stars planets and galaxies in the past before time and the universe existed :-). If the images you see in the universe were really in Earth's past, you wouldn't be able to see them because the the past no longer exists. Light and images cannot travel for 13.8 billion years (into the future:-) without a power source, when energy stops the lights go out. Einstein was either an imbecile or fraud lol. I don't understand how people can be this stupid :-).
As you gaze at our creators universe, realize it's not a figment of your imagination. The stars planets and galaxies you see with your eyes are in real time. not a past dimension of Einstein space-time.
Radio waves travel at 186,000 mi./s (half the speed of light) as each particle must charge the next particle in space. Einstein conflated the speed of particle radio waves with bipolar light waves that travel 186,000 mi./s in each/all directions instantaneously. The speed of light is instantaneous-bipolar light waves travel 186,000 mi./s in each direction. 186,000 minus 186,000 = 0 duh. Any attempt to measure the speed of light inside a glass vacuum tube would create light shattering (interference) thus breaking its state of superposition limiting its speed. So electrons eject instantaneously off metal from light, but the speed of light by itself is limited to only 186,000 mi./s :-). Either metal is acting as a light turbocharger or the speed of light is wrong duh.
Using optical clocks and lasers to prove Einstein's time dilation-space-time curvature is like using a metal detector to find gold at Fort Knox. The closer you are to the electromagnetic fields, mass and gravity of the earth the more light bends aka gravitational lensing.
The center of the sun is not the gravitational center of solar systems, neither are the center of black holes or galaxies the gravitational center for stars. If the moons gravitational force were pulling on Earth's oceans creating Tidal bulges the moon would have eventually crashed into the earth. Tidal bulges are caused from a reduced gravity-density on the Earth, just the reverse. The Magnetron gravity model explains why planets must orbit in a flat plane around their suns-stars.
The image of the molecule illustrates how the gravity of the ether is both a pulling and repelling force.
In space astronauts can overcome zero gravity with centrifugal forces of kinetic energy, density against the ether. At the center of the earth gravity is near zero so obviously gravity is an external repelling force (a centrifugal deceleration, density against gravity (the ether). The Earth like all mass is density against the ether (gravity of space).
Einstein removed the ether medium (coordinates of objects in space) replacing real gravity with mathematical gravitational wave clocks that defy the laws of physics. This magic trick allows projectile particle photons with mass to travel at the speed of light through nonexistent near zero gravity waves in space. Einstein was either an imbecile or a fraud.
The Magnetron gravity model debunks Einstein's Relativity, Quantum Mechanics, space-time, Big Bang, black holes, and our current understanding of celestial mechanics illustrating how light travels instantaneously in all directions independent of time, space and gravity. Magnetron
When the wrong understanding of a natural phenomenon exists wild and erroneous theoretical suppositions are made. Einstein is wrong, "time and space or fabric of spacetime is a non-physical mathematical model with no physical realities. Time cannot be magnified with a telescope nor stretched with a nonphysical hypothetical fabric of space. The emptiness of space is not a material body or fantasy union that can join space and time together and stretched like a rubber band. Particles are not telepathically connected :-) Explain how you can see and feel the infrared warmth of the Sun coming up on Earths horizon when light-speed (Einstein's space-time) tells us the Sun is supposedly 8 minutes and 20 seconds in a past dimension of space-time. The planet Mars is supposedly 20 minutes in a past dimension of space-time as well, yet this planet can be clearly seen coming up on Earths horizon. Are we to believe our eyes are playing tricks on us and the planet Mars is not really there? If light and gravity slowed or stretched its energy and distance would decrease, thereby violating the law of conservation of energy as more potential energy would be required :-) so the speed of light and gravity is instantaneous and cannot travel slower than it does. That's the law of physics, live with it. A light wave can travel in superposition instantaneously in all directions whereas the wrongly theorized Einstein's hypothetical projectile particle photons simply cannot. Using the electromagnetic wave as its carrier the speed of light oscillates instantaneously in both directions which explains the probabilistic nature of quantum mechanical phenomena in the double slit experiment. Either Einstein was an imbecile or fraud.
Attention Einstein's disciples: explain how time dilation can stretch light without stretching images in space. Newsflash, projectile particle photons have no DCU TV/monitor geometry conversion circuits. Our universe resides in a nonphysical medium of nothingness, if you were able to stretch it like Silly Putty the images of galaxies planets and stars would be stretched as well but would violate the laws of conservation of energy 🙂.
Time and space are independent of each other, the speed of gravity and/or gravitational waves as predicted by general relativity is equal to the speed of light at 186,000 mi./s. Last I heard gravity is near zero in space. According to Einstein's relativity the zero gravity of space-time in space exerts a gravitational force-pushing us down, pay no attention that the same space-time on the bottom of the earth is pushing us up with the same near zero gravitational force. Einstein gets a Nobel Prize for the photoelectric effect while telling us the speed of light is constant at 186,000 mi./s, if that were true photoelectrons couldn't eject (instantaneously) off metal since electrons have mass and would be slowed by Einstein's principles of gravity.
Einstein removed the ether medium (coordinates of objects in space) and replaced it with mathematical gravitational wave clocks. Newsflash, near zero gravity in space cannot be converted to real gravity using mathematics :-) czcams.com/video/0cjBdTwF6v8/video.html via @CZcams
This is absolutely fantastic!!!! I never knew I'd understand a concept so easily
Basically, if your going to time travel, wear a helmet.
Ali CG safety first.
Or a yellow vest.. :o)
*Impossible*
No wonder when I go for a run it feels like the longest 10 minutes of my life
😂😂😂😂
Then why does sitting in class feels like the longest hour in my life?
You can't feel time dilation for yourself. Only others can see time slows down for you.
@@yukikomatsu2447 That's why my instructor tells me you just ran for a minute. I got it now :v
Best and clearest explanation on this I've ever heard, blown away. Amazing.
Am simply blown away by this explanation. And as always, the most complicated things have the simplest of solutions. No wonder he's the Rockstar of Physics. Wish I could sit at his feet and learn from him on a daily basis.
The full show that this clip is from should be posted for all to view, it even had Matt Smith and Brian Cox chatting crazy stuffs at the start. Also some celebs during the different parts of the show. Fun, entertaining, interesting and educational.
Do you know where I can watch the full show?
Love Professor Brian Cox.. He's a National Treasure
Plus of course he made a cameo appearance in the Doctor Who episode "The Power of Three".
J May ?
And also he played one of the characters in An Adventure of Space and Time documentary released in 2013.
Kelly Davis Treasure? In that case, he should be REBURIED...A S A P!
Actually he is a bit of a prick typical BBC
It's weird. It's almost like I can't remember watching the last 7 seconds of this video no matter how many times I try.
I can't remember the very last second of this video.
-By the way, why have you posted the same comment 2.387.149 times in a row??
Did you have the sound on? Or was it just Silence?
After watching like 100 videos this one finally explained it perfectly. Thank you Dr. Brian.
Would love to have him as an instructor. I love this stuff!
" TIME is not the boss of me."
The Doctor: The Time of the Angels' April 2010 =))
You can travel to the future, just wait three minutes ! Boom ! It's the future !
***** omg I tried it and it works!!!
***** Instructions unclear, only travelled 2 minutes into the future. 0/10
So technically we can send ourselves up in pods for say 50 years and, while we'll be crippled old men by then, the earth would be hundreds of years older.
This was experimentally validated using very accurate atomic clocks around the middle of last century.
Three clocks were used: 1 stationary, and 2 were put onto jet aircraft and flown around the world at high speed, in opposite directions.
When the 2 clocks from the aircraft were put with the stationary clock, slightly less time had passed for those 2 clocks that had been on the aircraft.
All that proves is a man made mechanical device is affected by rapid movement.
@@richwills2322 - no - those three clocks were atomic clocks that based their calculation of passing time on the known decay rate of atomic nuclei, not on swinging pendulums or rotating gears.
@@pauligrossinoz Tell me then, why are astronaut's who spend a year in space traveling around the planet at 25 times the speed of that experiment still living in the same time as us? Shouldn't they be at least 10-15 seconds ahead or behind everyone else after that long and those speeds in space if you can travel forward or backwards just on an airplane. How about they show us someone who's traveling in space and predicts the winning lottery numbers 5 seconds before the drawing because they already heard the results, or who answers a written question before it's asked? That would be proof. Not a guy being pulled across a stage with a light bulb.
@@richwills2322 - *what?* _Are you serious?_
Do you even have the slightest comprehension of what you are talking about???
If somebody has aged a few seconds longer that everybody else, then tell me what would you expect to see?
Frankly, you couldn't ever tell if somebody has aged just a few seconds.
Try this:
Take two photos of yourself, with a 10 second delay between the images.
Now, besides the timestamps of the images, how could you tell that you were 10 seconds older in the second image?
You can't tell!
@@pauligrossinoz He didn't say they aged, he said they time traveled. So based on that they were either moving forward or backwards in time! And based on your statement of time passing differently flying high speed on a plane around the planet, by flying extremely high speed on the space station for 6-12 months, the astronauts should either be forward or backwards in time compared to us if that worked. Just gobbly gook theories that they know you can't disprove!
Love the simple and yet effective explanation 👌🏼
Time is a tool to measure the length of an event. Time is defined in seconds, hours, years. Time is not an object, It doesnt have atoms, therefore its not malleable. Time is a concept. Saying that time is bendable and transversable, is like saying that we could go back, through and forth in inches and kilograms. Whats discussed here is personal time perception in relation to relativity.
Finally ... someone who gets it.
(Thumbs up)
I love it when the CZcams scientists come out, claiming to know more than actual scientists.
I guess your definition of time is somewhat skewed. To physicists, "time" store the changes in space!
Your whole comment is pointless.
Yes bro
Amazing. I just love Brian Cox and how he can explain science in way we can somewhat understand it.
Mind boggling concept explained so well and in easy to understandable way, unbelievable- thank you
He is one of those scientist characters you go to when you find out you have time control powers and he'll be all attached to your abilities and test you and stuff.
I feel like I had a tiny memory loss after watching the end.
Mohamed Gamil what end?
@formulagamer playz what silence
Relativity is all about how you see things or perspective. Say you take two points and cross over at high speed you see distance small. Similarly when you move slow you see wide gaps between the points. So distance depends on framework. And frame work depends on matter. Sometimes the matter seems to be the other way crossed. Time travel is a matter component requirement.
If the stars, moon planets and galaxies are in Earth's past then the Earth would be space traveling in the future. If the images you see in the universe were really in Earth's past, you wouldn't be able to see them because the the past no longer exists. Light and images cannot travel for 13.8 billion years into the future without a power source, when energy stops the lights go out, I don't understand how people can be this stupid :-).
As you gaze at our creators universe, realize it's not a figment of your imagination. The stars planets and galaxies you see with your eyes are in real time. not a past dimension of Einstein space-time.
Radio waves travel at 186,000 mi./s (half the speed of light) as each particle must charge the next particle in space. Einstein conflated the speed of particle radio waves with bipolar light waves that travel 186,000 mi./s in each/all directions instantaneously. The speed of light is instantaneous-bipolar light waves travel 186,000 mi./s in each direction. 186,000 minus 186,000 = 0 duh. Any attempt to measure the speed of light inside a glass vacuum tube would create light shattering (interference) thus breaking its state of superposition limiting its speed. So electrons eject instantaneously off metal from light, but the speed of light by itself is limited to only 186,000 mi./s :-). Either metal is acting as a light turbocharger or the speed of light is wrong duh.
The center of the sun is not the gravitational center of solar systems, neither are the center of black holes or galaxies the gravitational center for stars. If the moons gravitational force were pulling on Earth's oceans creating Tidal bulges the moon would have eventually crashed into the earth. Tidal bulges are caused from a reduced gravity-density on the Earth, just the reverse. The Magnetron gravity model explains why planets must orbit in a flat plane around their suns-stars.
The image of the molecule illustrates how the gravity of the ether is both a pulling and repelling force.
In space astronauts can overcome zero gravity with centrifugal forces of kinetic energy, density against the ether. At the center of the earth gravity is near zero so obviously gravity is an external repelling force (a centrifugal deceleration, density against gravity (the ether). The Earth like all mass is density against the ether (gravity of space).
Einstein removed the ether medium (coordinates of objects in space) replacing real gravity with mathematical gravitational wave clocks that defy the laws of physics. This magic trick allows projectile particle photons with mass to travel at the speed of light through nonexistent near zero gravity waves in space. Einstein was either an imbecile or a fraud.
The Magnetron gravity model debunks Einstein's Relativity, Quantum Mechanics, space-time, Big Bang, black holes, and our current understanding of celestial mechanics illustrating how light travels instantaneously in all directions independent of time, space and gravity. Magnetron
When the wrong understanding of a natural phenomenon exists wild and erroneous theoretical suppositions are made. Einstein is wrong, "time and space or fabric of spacetime is a non-physical mathematical model with no physical realities. Time cannot be magnified with a telescope nor stretched with a nonphysical hypothetical fabric of space. The emptiness of space is not a material body or fantasy union that can join space and time together and stretched like a rubber band. Particles are not telepathically connected :-) Explain how you can see and feel the infrared warmth of the Sun coming up on Earths horizon when light-speed (Einstein's space-time) tells us the Sun is supposedly 8 minutes and 20 seconds in a past dimension of space-time. The planet Mars is supposedly 20 minutes in a past dimension of space-time as well, yet this planet can be clearly seen coming up on Earths horizon. Are we to believe our eyes are playing tricks on us and the planet Mars is not really there? If light and gravity slowed or stretched its energy and distance would decrease, thereby violating the law of conservation of energy as more potential energy would be required :-) so the speed of light and gravity is instantaneous and cannot travel slower than it does. That's the law of physics, live with it. A light wave can travel in superposition instantaneously in all directions whereas the wrongly theorized Einstein's hypothetical projectile particle photons simply cannot. Using the electromagnetic wave as its carrier the speed of light oscillates instantaneously in both directions which explains the probabilistic nature of quantum mechanical phenomena in the double slit experiment. Either Einstein was an imbecile or fraud.
Attention Einstein's disciples: explain how time dilation can stretch light without stretching images in space. Newsflash, projectile particle photons have no DCU TV/monitor geometry conversion circuits. Our universe resides in a nonphysical medium of nothingness, if you were able to stretch it like Silly Putty the images of galaxies planets and stars would be stretched as well but would violate the laws of conservation of energy 🙂.
Time and space are independent of each other, the speed of gravity and/or gravitational waves as predicted by general relativity is equal to the speed of light at 186,000 mi./s. Last I heard gravity is near zero in space. According to Einstein's relativity the zero gravity of space-time in space exerts a gravitational force-pushing us down, pay no attention that the same space-time on the bottom of the earth is pushing us up with the same near zero gravitational force. Einstein gets a Nobel Prize for the photoelectric effect while telling us the speed of light is constant at 186,000 mi./s, if that were true photoelectrons couldn't eject (instantaneously) off metal since electrons have mass and would be slowed by Einstein's principles of gravity.
If space was curved-warped gravitational waves would throw planets out of orbit, altering time as galaxies and planets ascend and descend gravity waves, cause gravitational lensing distorting, stretching and warping images in the Hubble and James Webb telescopes. Gravity expanding at the speed of light would make gravitational waves scientifically impossible! If light and gravity stretched, its energy and distance would decrease, thereby violating the law of conservation of energy. Explain how the speed of light can be measured traveling through a medium of nothingness. The fabric of spacetime is a non-physical mathematical model with no physical realities. Time cannot be magnified with a telescope nor stretched with a nonphysical hypothetical fabric of space-time. Einstein removed the ether (coordinates between objects in space) so you wouldn't notice all the stars, planets and galaxies would have to be moved ahead in time for relativity to work 🙂. Newsflash, space is not empty. According to physics if two mechanical watches were synchronized on earth and one traveled across the universe and back, there would be no difference in time between the mechanical watches proving the speed of light is instantaneous as the only way a mechanical watch will run slow is if you tighten the main spring :-). Using optical clocks and lasers to prove Einstein's time dilation-space-time curvature is like using a metal detector to find gold at Fort Knox. The closer you are to the electromagnetic fields, mass and gravity of the earth the more light bends aka gravitational lensing.
Einstein removed the ether medium (coordinates of objects in space) and replaced it with mathematical gravitational wave clocks. Newsflash, near zero gravity in space cannot be converted to real gravity using mathematics :-) czcams.com/video/0cjBdTwF6v8/video.html via @CZcams
I find Brian's thinking so fascinating, that makes space and time so fascinating for me.
That explanation was awesome. I get the concept finally. Back to the future.
When I was around 6 years old I noticed that when I hung out with my friends time went by quickly but when I studied it was long and boring. I had a thought. What if i focused my brain on slowing time in my head when I was playing with my friends, Like this I can have fun for a longer period. As absurd as this sounds I can now trick my brain to feel time go slower when I have fun but go faster when I’m bored. I hope someone out there feels like me so that I don’t feel like I’m talking out of my butt. I’m now 37. I sometimes feel like I’m coo coo.
Daniel Cervantes I mean that’s pretty normal
Daniel Cervantes woah are we brothers
How can you slow time in ur head ?
Reminds me of dumb and dummber
Same but Time goes by faster for me, since I ONLY pay attention to the present, and my present knowledge
Einstein worked that out in his head, in his imagination. Amazing.
well, he did have an iq of 160
@@GabstheGamerYT what 😅😂😂😂😂😂😂
It's also from doing tests an many observations
Time dilation has no significance for time travel in physical plane. It actually indicates the depth of space-time while observation made on speed of light is a projection at the surface. And time dilation said to be due to gravitation is also not true, it indicates the difference in levels of crests and troughs along the surface of space-time. Have published "New study of Gravitation and Fundamental theory of Singularity" [Volme 10; issue 03,04; 2023] - ARC JOURNALS - International journal of advanced research in physical science - Open access for free download.
Series of papers (totally - 9 nos.) on ""Theory of Singularity" - The new study hope to serve one fundamental for general relativity and quantum mechanics...
1) New representation of Gravitation
2) Structure of black holes
3) Finite structure of space-time.
4) Real dimensions of space-time
5) Singularity
6) Source of dark energy...etc
FYI, thanks.
Thats one of the best explanation vid on time travel around
What a wonderful demonstration of time by two of my most favourite scientists .
I like the little thing you did at the en- wait, what was I talking about?
That's great! after learning how to time travel and instantly having the silence make me forget everything I learned.... That's fantastic!
As the movie Interstellar demonstrated to time travel into the future would be devastating for a human being to suffer as you would return to see that everyone and everything you loved was now much older and lived full lives even though for you it would have felt like only a small amount of time.
I could watch Brian all day. Brilliant
Love brian cox. How he explains things is amazing
How can you not love science. This stuff is amazing!
It is if you understand it, something I have trouble with sometimes lol
How can i love somoene who say that you can't go back in time? Fk them all, i don't want to go to the f future.
I saw this play years ago.The actor walked onto the stage and said,my but how time flies,and this clock with wings flew across the stage.
Watched this episode when it first came out and I was stunned. Where can I find the full episode again?
love it!... every time we look at the stars or our sun we are observing the past in our present isn't the universe a wonderfully strange place :)
Lame, i want a true time travel.
The interesting fact is that the motion required is not limited to the "linear", rotational and vibrating bodies are governed by the same laws. Could one enclosed in a sphere that is moving (or it's field) at or near the speed of light also succumb to these effects?
Yes they can
I love Brian Cox he's such an inspirational person
NOT prepared for the silence at the end of that.
Brian Cox has now given me hope for being a pro Time Traveller.
BimodalMetal6 he may be a little TOO ,scientific. ......That type of intellect though often brilliant, and focused, can also be narrow..
Thank you for that advice 👍🏾
This blew my mind.
I have a good question. Let's say you have two entangled electrons moving at about 2,200 kilometers per second. Now you put tone on earth and the other a travel around the sun and back on a space ship. Physics shows time pasees differently on both earth and the spaceship. If the electrons are constantly entangled, how does that affect the speed of electron, and which one if not both have been effected?
Was not expecting that thing in the end to show up..freaked me out
What is even more interetsing is that we can go beyond the claim that 'time is personal' to the greater claim that 'time is localised in our bodies'. In other words, different parts of your body are moving through time at different rates of speed! Your arm which is moving is travelling at a different speed to the one that is stationery. Your head, which is higher and subject to lower levels of gravity, is moving at a different speed to your feet which are lower and subject to greater gravity.
Jim wasn't only moving in time at a different speed to the audeince but he was moving at a different speed to HIMSELF!
If that doesn't blow your mind then I'm not sure what will.
Did you come up with it yourself or you read it somewhere else?
@@ashfauzzamanaronno6606 I simply applied to our bodies what science claims. Gravity and velocity are the two factors which affect the speed of time and neither are uniformly spread around the body.
Time travel is not just a possibility, it is a fact, as we are all moving into the future one second per second (this may vary, but we are ill-equipped to perceive the variations, if they do occur). Common sense would dictate that anything that progresses can be also made to regress, except we know that some processes cannot be reversed. Ex.:You cannot unfry an egg. (Yet, a wiseguy would say if one could reverse time, then you could!)
Running a video backward gives us a hint of what reversing time would be like. Because time is as much a function of space as distance, the laws of physics would appear to contradict themselves. If you dropped an egg on the floor and wanted to use your time reversal machine to neatly put it back in its shell and avoid that accident, you would simply create a time loop because as you reverse time for the fallen egg you are also undoing your own memory of what you did to cause the egg to break in the first place. You'll just do it again when time resumes normal flow, and use your time machine again, ad infinitum. Just like a movie never changes, no matter how many times you watch it.
But even an infinite loop needs to be powered by something. Nothing gets accomplished without a source of energy. Otherwise, your infinite time loop is a perpetual motion machine, and physics frowns on that with the fact that energy is finite, and will, eventually be used up.
Superman was somehow able to save Lois Lane by reversing the spin of the Earth. Well, that would not be enough. He'd need to do that, while reversing the orbit of the moon, and reversing the Earth's orbit around the sun, and the sun's movement in the galaxy, and the galaxy's movement thru the universe. If time encompasses an even bigger environment than that, then even _this_ would not be sufficient.
Assuming that it is an environment, what would happen to you if you could throw yourself _out_ from its influences? We are very much creatures of our environment. Just by going out into space, we would die without air to breath, pressure to hold us together, and all the other things we need to live, but are missing out in the void. In the same way, we need time to keep all our biological processes going (and that includes being able to think!). Which means that while a TARDIS is in transit, it is outside of the influences of normally flowing time, however, it either takes a chunk of normally flowing time with it (or artificially generates it) in order for it and the Doctor to be able to continue to function normally. If this ever failed, I shudder to think what would happen.
Then time travel is not possible in the way we want it to be. we will always be in the present just moving forward since we cant truly skip nor revisited past events to see or change them. all this is really is the same logic as watching water boil as not to watching it.
Unless of course you are in the dc universe where earth is and has always been ground zero for not just the universe but the multiverse. Now im not saying that what you said wouldn't be true for real life. But in the dc universe all supes would have to do is turn earth back because all of the universe is conected to earth directly
Scientists just uncooked an egg a couple days ago. So, yeah...
Superman didn't reverse the spin of the earth, the earth slowing down then spinning the opposite way was supposed to be the visual clue that Superman was going so fast that he started going backwards in time himself, but it was always unclear (this is mentioned in a few books about the movie and in the special features of some. but not all, of the dvd and blu-ray releases). In any case I think you've missed the point of the video, which is that there is no such thing as `ordinary flowing time' time, like space, is particular to the body experiencing it. There is no such thing as `normal time' it only seems that way because we all travel at speeds insignificantly different from each other to notice the different rates at which we experience time.
Which begs the question, if he can travel that fast, why couldn't he dispatch both of Luthor's missiles?
Something that was not brought up was the fact that the astronaut's frame of reference can't be inertial if he's leaving earth and returning to earth. He has to accelerate away from earth, and then back towards earth, and from his perspective he sees gravitational fields which affect the passage of time at different points. If the astronaut was in an inertial frame during the whole trip (which is impossible by the way), he would see earth age more slowly than him, but earth would also see him age more slowly than earth. This is because you can put the origin of the frame of reference either on the astronaut or on the earth, and make either of the objects stationary if both frames of reference are inertial.
When it comes down to it, if you had a clock on earth, and the astronaut had a clock, and you set both of them to 0 at the moment the astronaut left the earth, then if the astronaut's frame of reference were inertial during the whole trip, he would expect his clock to be ahead of earth's clock. Earth would feel stationary too, and expect the astronaut to age less, so earth would expect its clock to be ahead of the astronaut's clock. Both clocks can't be ahead of each other. If earth's clock read 5, it would predict the astronaut's clock be T where T5. That means 5
It would be good to see more of this lecture, does anyone know where it can be viewed??
What Brian doesnt mention, is that time dilation also occurs near tremendous amounts of gravity, like a black hole. Time slows for the observer the closer they travel to the event horizon of a black hole.
The same principal though no? Movement vs observation?
@@stevehughes8027 Movement isnt required near massive amounts of gravity. You and I could both be standing still. If I'm closer to this massive amount of gravity, time is moving slower for me. Or faster for you.
@@faceman3585 is that to do with light/matter struggling to travel with the gravity or?
@@stevehughes8027 Exactly. Immense gravity can bend space time/light. Light moves so fast, it is basically time. Yet, light does not experience, or is not affected, by time. That's how Einstein first thought about his theory of relativity. He was traveling on a train past a clock tower. A glare came off the tower and was shining into his eyes. It was like 10:30 or whatever. Einstein theorized that the ray of light that blinded him in that moment is always 10:30 light. No matter how far that ray of light travels, it is always carrying the information from exactly 10:30. Pretty cool.
@@stevehughes8027 Hence why we can see the light shining from stars that blew up millions of years ago. It's like viewing information from the distant past.
It's 2057. Who else is watching this.
Yo it’s me in 2076 Ah, 2057 was a great time.
I’m high asf and y’all are scaring me that you’re being serious
Hello from 2150 the daleks have taken over, go back as far as you can otherwise they'll get you
Astral projected from the realm of WE, to find that there was a huge riff in the timelines. Due to cerns hydro collider bringing forth what We are now calling earths great Shift .
Thus earths been sucked into a black hole with no cordinance in sight. Its was either this or let astroid aumanomu destroy earth. Wait, that means I'd be stuck here, this timeline as well.. Could be worse, we could all of become non existent/extinct and don't know it . .yet?!!
😅😅 Gotcha 😉✌🖖
@@_Y.Jit’s me from 2318
At 2:28 Moving clocks don’t run slower, it’s just a perception because of your own motion. If someone fires a laser at you at C ( speed of light) and you are on a rocket going away from that laser at C, the faster you back away from the laser, the slower the laser appears but it’s still move at C. You perceive that light/time is slower but it’s an illusion.
A fantastic explanation. All that's left now is to explain time travel to the past.
Who’s watching this after watching a time-traveling movie and left him wondering if time travel is indeed possible?
Yep I watched 11.22.63 and 11/10 recommended
Close enough. I was thinking about the movie interstellar where time moves more slowly on the water planet. Then I remembered this gem of a video. 👌
I watched dark. They have cleared most of doubts but keep me search for more.
Mind blown! Even more fantastic is that we could see into the distant past but only if we could travel much faster than the speed of light. Travel in an instant to a far away planet say 65 million light years away, set up a ridiculously powerful telescope and look through it back at Earth. You would be witnessing Earth as it was when the Dinosaurs roamed!
But we cannot and never will be able to travel faster than the speed of light so it is a pointless thought excercixe
@@artful1967 yet interesting to think about, so not pointless
I don't think I really understand the explanation fully yet, but what might be a tangent, or what he's saying partly, or what commenters are saying...is time is an earth bias, so we project it on the universe....but if an astronaut slummed it in space for a year, letting earth round sun, then come back....yeah that'd be a year for earth, but the astronaut abstained from our time. So it's something with not outpacing light, but being lapped to go back, and to go forward, you reverse engineer future in passed. Or stay somewhat ahead of Earth's rotation. think his explanation is actual science though and I'm imposing on it.
Supervisor: Why are you late?
Me: Time is personal to us.
One of the best demonstrations of time travel
This is like the movie interstellar. Interesting theory
I want to time travel back to 2010 because I don’t want to live in 2020 anymore........... *WE NEED TO MAKE IT POSSIBLE*
Foolish
Can't go back in time, I'm afraid. But don't worry, you may be among the 5% of for who making it past 2030 has been planned. Mind you, you need to be mightily rich to be a part of the plan.
The virus plot failed. Now they are driving us into a planned economic collapse, so we'll die from poverty. I would have preferred to just die from that failed virus.
Imagine the confusion if the past was flooded with people from 2020/2021
@@abdumalik5586 yeah I know your foolish
I believe the basis of this is that speed of light emains same, but isnt the speed with which the chair is being moved gets added to the speed of light and thus makes time same for both
The ending scared me so much!
Damn I couldn't imagine how cool if he is your Physic professor.
Maybe finish English classes first?
Time travel is possible.
When i go for studying, 1 hour becomes like 1 day.
When I play video games, 1 hour becomes 15 minutes.
that's ADHD, haha
It's your interest bruh you just don't like studying I guess 😂
Okay, theoretical scenario. Build a particle accelerator large enough to put another particle accellerator inside. This would double the slow down. Now if you had a bunch of nested particle accelerators you could stop each in sequence and almost completely stop time. Unfortunately they would have to be running the entire time and would only feel like a moment to the object inside the last.
This seems to just be a show of how we would observe light and the time it takes to observe it if you will from different vantage points. Velocity alone does not change the rate of decay of matter.
If we imagine the audience as being a single eye, "time" has only slowed down for Jim from a lateral perspective. Had they towed Jim _towards_ the collective "eye" of the audience, the light would have appeared to be just going up and down, exactly as Jim would see it. With one caveat, the light clock would appear to be _speeding_ _up_ , as each progressive "tick" of the light-clock would reach the audience's "eye" faster for the simple reason that each light-image emitted from it has less distance to travel to the observer (the eye of the audience) than the one which preceded it. As the same time period can't slow down and speed up simultaneously, we must conclude that both the dilation and the compressing of time in this instance are an illusion. Time is an abstract tool of measurement that we have invented, not a physical entity in and of itself. Had I been present in the audience, I would have asked Brian to tow Jim towards the audience and then explain to them why Jim's "ageing" appeared to be speeding _up_. We are all time travellers - every second of everyday we are travelling into the "future", the super-fast rocket ship will just get you somewhere else quickly, but your seconds will be the same length as they are for the bloke who just stayed at home is his easy chair.
James, the professor was simply using the axis perpendicular to the viewing angle of the audience to illustrate visually that a greater distance had been covered. Even if Jim were headed toward the audience, the distance traveled by Jim's clock would be greater.
Every time we walk, different parts of out body are moving at different speeds. Our blood is moving through our veins at a different speed to our skin. Does this mean all these different parts of our bodies have time travelled into the future?
Lets do a thought experiment: I leave my left arm dangling stationary. With my right arm, I swing it round and round at 0.994 the speed of light for 10 years. After this time, my right arm will have aged 10 years, but my left arm will have aged a lot more (29 years, by using the figures in the video). So both arms have experienced time differently. But can we really say that my right arm has travelled into the future, or that my left arm has travelled into the past? We *could* say that, but the meaning is completely different from the time travel as understood by Back To The Future and other Sci-Fi stories.
I take my watch every where i go
Never would have thought to see Brian Cox on doctor who YT channel
Am here after watching DARK cause it was amazing!! One of the best show ever created
I watched the whole presentation on Netflix. It was awesome and now I understand how time travel actually works.
Is it still on there?
Yeah, just black and lesbian
What show?
Thanks for telling that. I have Netflix. Will check it out.
What’s the tittle on Netflix?
The light source was moving not the light beams, so a sleight of hand is being played here
@Metallisika the distance traveled was not greater, the distance was objectively the same. A sideways force and a vertical force such as is applied in this case, can be measured, and its effects on the light bulb predicted. Jim might only perceive the independent motion of the light, but the absolute sideways motion from the force applied to the chair results in the changing starting position of the vertical independent motion.
In otherwords, as Jim moves up and down the bulb with his hand, the starting position of the ball continually changes, and this accounts for the triangular zigzag motion. The bulb does not travel greater for anyone. The two separate motions I have described must be separated.
@Metallisika yes agreed, you cant add these motions together, thats why I said you need to separate them. But theory of relativity assumes you have to add different motions together and that light is the one exception. The distance is not increasing for any photon depending on the observer, the photon travels its own independent distance at all times. The atom travels faster so nothing surprising there that they last longer.
@Metallisika the rule that velocities can be added together I meant
Yeah and if u go fast enough time will stopand u can still move and not age while people around you are stuck in normal time aging faster than you this is amazing stuff and you explained it very clear and simple
I believe that if you tried to travel back in time, you would collide with an earlier version of yourself, and you would either be stopped or destroyed. It would be like driving on a single- lane highway with bumper-to-bumper traffic behind you, which reperesent yourself as you traveled forward through time, at the normal rate of one second per second. If you tried to put your car in reverse, the cars behind you would crash into you, causing a cataclysmic event.
You might be able to travel forward in time at a slower rate relative to everything else, but the past is inaccessible. Maybe information could be sent, but not matter.
i agree. time in fact time can be slow down. but we never would be able travel to going back. because in fact. time is always moving. it never would stop. it only can slow down. we probably could make it slow as it possible. because at this rate. we only chasing it. but not beating it in a race. we only could equalize the time by 0,00000001 per second
because I think if we might to try to circling the earth which is round. i mean circling the earth with the same place to the same place destination. at the speed that keep increasing. i don't actually know if this would work. but maybe, just maybe we could slower the time until it reach 0,000001 per second. lol
and I guess. at that time. we have literally stop the time
SHUT THE F UP with your fking ' you can't go back in time and ' your ' you can't change the past ' loving pure bullsht. So what you want me to do, sit here and smile and say things like ' hahaha there's no turning back '? No laws show that you can't go back in time and i will not ever agree with you and you time bastards and fk all of you and time.
@@user-my7lk9yn8v SHUT THE F UP with your fking ' you can't go back in time and ' your ' you can't change the past ' loving pure bullsht. So what you want me to do, sit here and smile and say things like ' hahaha there's no turning back '? No laws show that you can't go back in time and i will not ever agree with you and you time bastards and fk all of you and time.
@@timeistheworstthinginthewo169 Got some deep regret issues, I take it. Well, time marches on!
@@mikes4135 Marches on my ass. Why the f would somoene want time travel to be impossible or just like telling that you can't go back in time like it would be a good thing? There is more than just saying ' hahaha, there's no turning back '. Not listening, not agreeing and most importantly, fk all of you.
I was going to make a comment about something, but I forgot...
did u remember
I am from the future the guy is still smoking high, I guess the world will never know what he was trying to say that one fateful day
Cool
You should probably write it on your hand next time
Time and time again I often wondered about time travel.
Catharsis. This was too beautiful.
Here in 2035 and yes it is possible and also your girlfriend is a quad Cali (future meme)
I will remember this comment
@@shadowman3557 i wont
@@dyln3242 good for you mate
@@shadowman3557 thanks.
Digital Dylan you’re welcome
What show or program is this? Anything with Brian in it, I'll watch
Drew Peterson The Science Of Doctor Who
Jacques De Vere You sir, are a saint
+Drew Peterson There is also: 'Night With the Stars.'
Watch wonders of the universe then.
Christmas lectures BBC.
Why did they do the end of the video like that : (((((. I loved his explanation here. The fact that this knowledge is "free" is incredible.
How can I live on after this. This is so important for us.
Finally someone demonstrated the relativity as easily as I could understand. Kudos
Heyyy syed, do you remember me, I found you here by chance , this is aneesa , Katrina hades … can you recall?
@@georginawilliams7749 heyyy, woah! That's an unexpected place to collide. How's you
@@georginawilliams7749 yes of course I remember
@@syedjafferimam5789 phew, since it has been a long time I thought you might not be able to recall, can you text me on WhatsApp on the number I have above coz it’s hard to talk here , quite public lol
@@georginawilliams7749 no it's been just 3 & a half years why would I forget.
I’ll sign up for the time travel experiments If this guys doing them, all I want is to go back and live out my days with my past self and family
Well, time travel into the past isn't possible
Sounds like Tom Cavanagh playing Harrison Wells in FLASH
Did his best work as the keyboard player for Dare.The British answer to Bon Jovi.Check them out, they were very good.
Ah , so the Movie "Flight of the Navigator" was partially accurate afterall !
I might be stupid... I dont understand why his clock would be ticking slower than ours
Danner you're not stupid. It is great to be curious, mate! This is because time is not absolute! Time is not independent, i.e, time cannot be same for everything moving at different velocities, no matter how minute the differences are. But time differences for earthly velocities are negligible due to their magnitude.
However, when you approach the speed of light, the time dilation does becomes more profound. This is what the Theories of relativity (SR and GR) were about. Everything is relative. The faster you travel, the slower will be the time for you! Same for Gravitational pull. The stronger the gravitational pull- slower the time.
Science can only observe what is happening, but it cant tell you why it is happening
I love Prof Brian Cox -hes amazing
I just realised you can calculate time dilation with Pythagoras and it makes so much sense!
It’s definitely possible with time dilation. Think of the movie interstellar. If one were to go to a planet that’s affected by the gravitational field of a black hole or something similar, time on that planet could be moving significantly slower than time here on Earth. In the movie, an hour on the planet that was affected by the black hole would equate to 7 years on Earth. If one were to purposely stay on this planet for a day or so, they would essentially be traveling to the future. When they get back to Earth, they would be around 200 years into the future!
Except you would be fried by radiation if you ever got that close to a black hole. Don't believe everything you see in "the movies".
In Star Wars, the planet Coruscant was set in the centre of the galaxy. In the centre of all galaxies exist massive black holes. It's an uninhabitable zone. Go figure!
That movie was insane and scary at the same time. Who knows Nasa could have already sent people to a different planet we know nothing about
@@PreservationEnthusiast in todays world im sure they have a way to protect them from radiation by a simple suit that any normal person has no knowledge about
@@SeanOliver5981 There's no need to get involved with conspiracy theory. If we had the technology for interplanetary travel in reasonable time period, which clearly we don't, all kinds of other problems would have been solved. For example nuclear fusion, where we would have almost unlimited free energy. Instead of the archaic processes of burning fossil fuels and destroying the planet with global warming.
@@PreservationEnthusiast Even if we did have it then it wouldnt get used...just because something is there does not mean its a good idea to use.
Curiously, our galaxy is rotating. The outer side of the galaxy is rotating faster than the inner side. Sort of like a giant solar system, with that being said, are outer side of the galaxy less advanced than inner ones?
270 km/s is a galaxy's rotation speed, around 100th of what speed of light is.
So.. 100th faster/slower depending where we are.
So time is elapsing at different speeds in different galaxies, depending how fast they spin.
That’s so true! According to special relativity, time will dilate by the velocity of the object. For instance, time in high speed rocket is slower relative to Earth, which means when a year passes by on Earth, only a month passes on a rocket.
My Cox is standing proud ! Bravo