Brian Greene Explains The Discovery Of Gravitational Waves
Vložit
- čas přidán 10. 02. 2016
- A landmark day for Einstein and our understanding of the universe: the detection of gravitational waves. Brian Greene explains the discovery.
Subscribe to our CZcams Channel for all the latest from WSF.
Visit our Website: www.worldsciencefestival.com/
Like us on Facebook: / worldscience. .
Follow us on twitter: / worldscifest - Věda a technologie
It's amazing a mind that lived 100 years ago knew about this. A true brilliant mind.
+HighIQuit His IQ was aprox 160 while we are hovering around the 100s.. They should find a way for humans to reach further heights..... that would open even more possibilities in general...
+Itchy 0ne Grip IQ crap! Einstein never took an IQ test at any point. In fact Einstein did not do much well in the university at that time. You guys come up with crap IQ score for Einstein just because he is intelligent.
+Itchy 0ne Grip IQ, EQ.... All insignificant next to the power of the concentration and level of focusing ability
+HighIQuit ....and the flip side is that science is under constant attack by one segment of the U.S political system.....and the majority of the politicians are scientifically illiterate...
+Waryaa Moxamad Ahh, the infamous "I am not a scientist, *but* " catch phrase politicians just love...
Nice explanation. And posted within the first hour of the official announcement being made. :)
+Wayne Herman subbed as well, good looking out..
+Physics Videos by Eugene Khutoryansky However they have known about this since September 14 2015
All the science gurus have had vids like this one on standby for months now. Word leaked out last year about this find but LIGO is apparantly known to be diligent in their testing and wanted to be absolutely certain before they blurted out Eureka! I was surprised because i heard it might be up to a year before they announced officially, but it only took a few months. I wonder if that means they found more shifts?
Michael McMurray actually right before i read your comment, i watched a vid on it and it claims the LIGO team found signs of g waves in their test runs in the very first week before officially running full power, and since then they have indeed been finding more waves, announcements sure to follow in the coming months after enough evaluation.
Michael McMurray i felt taller for a moment just now, did you?
I love that he's bouncing up and down as he's demonstrating the affect of the waves.
I lived to see the Higgs boson and the gravitational waves being found. :')
+Rodrigo Appendino and you don't understand any of them
saul castillo Yes, I understand.
We are lucky
Nobody can explain this stuffs seriously. we know only 0.1% of universe's mysteries.
I said I understand Higgs boson like a physics student. I didn't said I understand everything we humans don't understand yet.
this guy is an awesome communicator
Lord I hate being mortal!
Immortal would be worse
+Adam Levin I'd guess there are more people willing to try the former, rather than accept the latter. It's the foundation of religion, after all.
+Adam Levin What if you were technically immortal but can choose when to die?
+Jolly Joel Thats what i want.
+Adam Levin well, i would be happy with a few thousand years too :P
There is no end to human creativity and innovation. Proud moment for us all .
Thanks so much for the explantion! Obrigada!
Sir u are brilliant in explaining quantum ..from pakistan
This is the biggest news of this century. Last century's was Einstein's theories of Relativity and the Photoelectric effect. Einstein still makes the biggest news hundred years after he's gone
+Astro Physics I wish the headlines had been "Einstein: Right Again!"
It would have been very appropriate.
+Astro Physics actually he's only been gone 60 years. ;)
+Kirhean Well, he was dead wrong about probability and QM, wasn't he?
Einstein was a beggar in royal robes. Relativistic Physics and Quantum Mechanics are atomistic constructs. The aether is real and everything is electromagnetism and electricity
@@Nautilus1972 he's the one who discovered Quantum entanglement
What a great time to be alive to see history being made before our eyes!
How does this not have a million views yet? Brilliant explanation. Thank you.
Bcz all persons are not capable to understand this 🙃
The significance of this discovery cannot be over stated. It is truly a new sense to explore the world with like hearing and seeing.
+lietdune3187
Absolutely. A really big deal. I was disappointed by his ending though. Technically we will not be using as he said "gravity", but rather the ripples in space-time. Which I suppose is what we refer to as gravity. And for the general public, I suppose is reasonable. But I'm a bit of a pedant.
Great news though.
+lietdune3187 how? how will you be able to explore this? you don't have a clue what's going on so shut your mouth and go to church for real explanation.
+Clint Flicker I suggest you follow your own advice. That way you can get your bedtime story read to you, and the grown-ups can talk about important matters.
PathosFear It's easy to belittle. It's harder to explain. Tell me, how is this "discovery" going to help you in your life? I've discovered something that helps me, as well as billions of other people around the world, in my daily life. Don't be jealous that this "discovery" means absolutely nothing in the grand design of things.
Clint Flicker
Well, I only belittle where belittling is due. I don't give a shit about your personal discoveries about fictitious gods. Come back when you have any actual proof to present about their existence... You know, proof that isn't "for the bible tells me so." Maybe God can then explain the whole gravitational wave thing for you, because frankly, I think that is what it's going to take to get through that thick barrier of indoctrination you got built up there.
Until such a time, stay out of scientific discourse, if religion is the only thing you will bring to the table.
The ending statement about waves of light and now gravity left me in awe. Looking forward to all the new discoveries!
+Kassyni Savior I hope they can get down to business on finding out more about dark matter, especially with the help of this. And hopefully that will help reform even more theories.
Best explanation of what happened and what it means of all the CZcams and science blogs out there.
I cannot wait to see and hear what we can do!
When hearing this news I screamed out in delight this morning at breakfast only to have my wife and children go "oh Dad"
+Scott Leaf
I can certainly identify with you there m8.
lmao
+Scott Leaf I think they hate you as much as I do!Buy, a pipe, Space Cowboy!
+Scott Leaf You screamed out in delight? GTFOH.
aye 'tis a great time to be a nerd. rulers of Wolf 359 ( yes it real)
1.1 billion dollar bowl of Kool-Aid
Thanks for such a visual explanation! I understand the process now :)
Thank you Sir.
Research Complete: Gravitational Waves Theory Confirmed
You have now unlocked Hyperdrive & Gravitational Shield System.
what's about the tectonic movement of the earth? it can also influence the measurement?
That's why we need to confirm this finding by setup the same setup on the moon, then compare the wave frequency and time.
Rabii Chadli
That's why two detectors at either end of U.S. were built. A tectonic event (to use your example) would affect them differently due to relative distance and direction. Also, the arrival time to the two detectors would match propagation speed of tectonic waves. In this case, the same gravitational event affected both detectors equally (due to the space distortion) and the time difference between each detector's readings match its propagation at light speed as a gravitational wave would spread.
I see, good point Brian Deschene. How about if this force was generate from the earth rotation? if the earth core has liquid iron, it could generate this shift the laser detected? That's why we need to move the measurement away from earth. Can we move the instruments into space, say build a number of satellites to work together to detected this.
simple impressive explanation of a complex experiment. thank you sir.
Epic! New way to understand everything again.. A new era ahead.
Warp travel here we come!
so, what's on the other side of that space time fabric?
+JoeOf91 a restaurant
+JoeOf91 wormholes are said to be holes in space time so anywhere else in the universe could be on the other side
Kim kardashian's other cheek.
+JoeOf91 Obviously another universe.
an infinite numbers of realities
I'm just happy for the scientists. At the end of the day I will never understand the mathematics behind it but when you see scientists dedicating their lives to this especially in the theoretical field its great to know that they know their work isn't just a science which may have already reached its potential of discovery
Yeah, Its really nice explanation of Detection of Gravitational waves.....................................
What if the world is stretching and contracting like a balloon due to geological phenomena (that we don't know yet), not due to gravitational waves?.
Ideally this should be done in space at three fixed references?
I'm confused!
based on wat ive nderstand, it,s the spacetime that warps not objects like planets etc
+light kira but @1:33, it seems the earth is distorting, it should be, right?. coz if the space is distorting then anything in it should follow it's distortion.
Good point. It may be the unusual expansion of Earth, like a rare earthquake.
Gravitational waves are making waves in Science!!! :D
+graduator14 crash bandicoot
Spyro
+graduator14 I'm trying to live to the confirmation of M-theory (Brian Green's field of research, by the way - in theoretical physics).
Best explanation so far!
Thankyou sir, for a wonderful explanation about Gravitational Waves 3.10 min video worth watching ......
How can anyone dislike this video
It's outdated bat shit crazy talk. Gravity is not the Sol operator of the cosmos.
...
+Powdered Toast Man You know they'll probably say there's another explanation for it or it was just noise
+DANG JOS yeah i think that too..
if the thing they are trying to detect is so minuscule then how can they absolutely rule out everything but what they had no idea or clue about.
that's crazy!
A physicist seems like a good job.
once you get past the schooling and shit..
you can practically be a story teller... and there's no editor in chief to kick your ass when you tell a tall tale... that tale will just get lost in the hype of the latest tale.
***** Well that's not actually true. That's one of the great things about physics and many other branches of modern science. There is someone to make sure you're not telling a tall tale. It's called peer review. Other physicists check that the scientists doing the experiment didn't screw up. And if you don't trust that, you could even look at the paper yourself. This is a big difference between actual science and pseudoscience
I want the long explanation
Channel: PBS Space Time
:)
+Lee Noo here is the full explanation, journals.aps.org/prl/abstract/10.1103/PhysRevLett.116.061102#fulltext
The power of the Michelson-Morley setting is awesome.
Yes! Thank you brian my friend
what a great discovery
Wait a minute, this video implies that the tunnel length is changing, so in one arm of the tunnel, light has to pass more distance than the other arm, casing the waves to become out of sync from each other, causing interference.
But if spacetime itself is stretching, then the tunnel arm and the light waves passing through it will also stretch in equal amount is not it? so the waves will never go out of phase. its like drawing a wave shape in a sheet of rubber and pulling it. we should never get an interference pattern in this setup.
Wow, what a great comment. And I am not being sarcastic. Perhaps you are a physicist? In any case, your comment gave me pause. But lets consider the effect of warped space on various entities. I assume we are both in agreement that this is the crux of the matter, warped space, whether in waves or not. Well what is the difference between warped space on light versus normal matter? We all know that if you toss a baseball with a small space curvature, say the earths gravity, the effect is quite large. It curves back to earth. But if you fire off a laser beam in earths gravity, the effect is very miniscule. So as a rough estimate, any g wave passing by should affect matter much more intensely than light. Just my two cents.
+Marv3Lthe1 In a vacuum, light always travels at the same speed (the speed of light), regardless of any spacetime stretching (and regardless of inertial reference frame). Thus when the gravitational wave passes by LIGO, one tunnel contracts and one expands, and the laser beam must take less time to traverse the contracted tunnel as compared to the expanded tunnel. Thus there will be interference effects. I believe that there will be a slight frequency change in the beam as the gravitational wave passes by, but this doesn't affect the speed of the beam and I don't believe it would have any effect on the experiment.
+Marv3Lthe1 As Paul stated above, speed of light will not be affected by the waves, only the space around it.
+Paul Bartrum Conversely, if the light wave and the tunnel both shrink, then the wavelength of the wave in the tunnel also shrinks, and, since the detector is L-shaped, it winds up with a different wavelength from the light in the perpendicular tunnel, thus creating an interference pattern.
Gravity red and blue shifts light, fella.
So, if space is squeezed, the wavelength in that direction is reduced, it's called a blue shift. When stretched, it's called a red shift.
Light aimed straight up gets more red-shifted per meter of travel than light aimed parallel to the Earths surface, for the first few kilometers.
That's why they made the apparatus L-shaped.
Perhaps you should brush up on your GR before you go around judging folk.
awsome video just nice .....& fabulous
❤❤❤❤❤❤❤❤
gr8 explanation !!
Scientists should get paid more money! It's too bad there's more incentive to be a business man than a scientist (or teacher)
+AP Plus Podcast or a clergyman who doesn't get paid at all and actually speaks the truth.
+Clint Flicker lmaoooo. The truth. HOW CAN PEOPLE STILL BELIEVE IN THIS SHIT
Bran Hugh I don't know. How can 90% of the world believe in this shit?
NSA charged millions of dollars for this stupid cartoon...
Because idiots pay idiots more.
How would a normie acknowledge a scientist's work when is lame and too dumbshit to understand it
But can you surf on a gravity wave?
I think the guy above you is.
great explanation.
Nice explanation
Lies...there is no fabric...its all 1s and 0s..
1000101101111000110001
All fiction.
Amazing. Detection in the future using gravitational waves.
I see this comentary below and repeat it "I lived to see the Higgs boson and the gravitational waves being found.'
This is incredible and fascinating for me because the feeling awesome that is accompany these new discoveries in my lifetime. The science is amazing!!!
prffft. rubbish
Absolutely breathtaking discovery! Einstein was indeed a genius mind.
Excellent!
Where can I find more on the detection method of gravitational waves? Curious why we have only detected 1 when we're swimming in gravitational waves.
Fantastic stuff.... Next???
I don't know much about this setup with the lasers and I apologize in advance if it is already explained but I am only wondering if there is anything else that could potentially disrupt the interference pattern of the lasers or is it 100% certain 2b "gravitational waves"?
In other words, can it be proven that it is indeed gravitational waves and not some other phenomena that is disturbing the interference pattern of the lasers and if so, how?
wow very nice video,far better than any other of this topic.
Nice explanation.
Could you please tell me where you got the Neutron star merger video ? thanks !
it has brought new revolution in science,,,,,,,
thanks for good explantion
finally I understand . thanks
thanks for the neat explanation :)
Love Brian Greene
Excellent explanation. Big up to Einstein and his boys.
Oh my god, I'm incredibly excited!!
I'm blown away by the fact that they can make sure they detected the gravitational waves, omitting all other phenomena (vibrations of the earth crust, interference, uncertainty in measurement), and because these gravitational waves should be coming from all directions from space, maybe they are cancelling each other out at some point.. I have no way of wrapping my head around this subject. Kudos to science, I feel so left behind trying to understand it.
Awesome!!!
I just had one question, from my understanding the gravitational waves from the event bend space and so we've picked up on the waves. How did they determine these were black holes and their sizes. Im not a science major, apologize if this is an ignorant question.
I need a key question for my presentation regarding gravity waves. Can anyone help out?
Brian Greene explains concepts real awesomely... Wish he was my physics teacher :P
I would never forget anything taught by you coz you make it so easy...
U r absolutely right.he is an amazing explainer of the difficult topics.i watch his videos 1000 times because of the kind of his explainstion
I'm waiting for it ever since I've read his books and the ones about Einstein
And what about Gravitational Radio Channel ? Can we use these waves to transfer music ? Information ?
Wow! That's incredibly briefed. Thanks a lot, sir! :') But, I have only one question, how the gravitational waves squeeze and stretch the planet (Or any astrophysical body in front of it)?
Yes, very nice even i can understand this.
I had to run to hear more about this!
Mind Blown! Einstein you genius man! You did it a century ago.
Hello Briane Greene,
I've few questions for you if you can answer them,
1) As per Einstein , there is no gravity but actually stars are sitting on and moving on fabric of space.time, for this be true, is their a weight of spacetime fabric so it can hold giant stars on it?
2) If fabric of spacetime is "something" rather than "nothing", the star's should crush on the spacetime fabric generating resistance, heat .. does this happen?
3) Some stars dont follow a specific rotation path in 2-D flat surface but some follow elliptical route in 3D how does this happen? how does the idea of space time as rubber sheet can explain rotation of stars in 3 dimentions
3) why the stars are rotating rather than just hanging in fabric of space time? and why from several billion years?
Hang on a mo... this confirmation is amazing, but, why does the animation show the 'stretching' perpendicular to the direction of compression? One LIGO arm was compressed along its length, the other along its width, ie, the length djd not change. Is this just a case of simplifying?
Thank you for explaining the concept clearly. Every other source starts and stops with a "ripples in a pond" analogy.
Big !!!? HUGE thank you for making this
I have seen no explanation of why we attribute the gravitational wave measured by LIGO specifically to the two colliding black holes. How do we know to link the wave to that phenomenon aside from the massive energy created by the collision?
Sweet!
Brian Greene straight killin' it
brian greene is the best
The only reason the interference pattern changes shape is because a gravitational wave is "roll by" like he said.So assuming that the interference waves are free of any disturbance or calculated compensation of know disturbance at first how do you know that what is passing or let pass thru is gravitational waves only or even gravitational waves for that matter.Could be something else we don't even know exist?
Thanks for posting this
good video
Thumbs up!
New Era is here. I hope that my life will be enough, to see just a tiny amount of capabilities, which will follow by huge changes in Human life. Future will be bright i see, if nothing wrong goes on..
Video is brilliant as well!
That is great news for scientists out there; great job people.
I had a few questions following the announcement that still trying to figure out. The most recent one popping in my head is, how were the two LIGO detectors been able to see the same frequency pattern, when their "L" shaped interferometers are facing in different directions (south and west)?
+Xe M They didn't. The patterns were inverted from each other just as you'd expect. They mention it in the paper.
This is the first video I've seen showing how this discovery was made so forgive me if this question sounds stupid.
How do they know gravitational waves are the cause and not seismic activity?
Feel free to tell me to do more research.
+burnininhell Do more research. Just kidding. You should assume that the hundreds, if not thousands of scientists and engineers involved in this research have a sufficient understanding of their work to rule out seismic activity. Besides, seismic activity would not be mistaken for this sort of signal, for reasons that are beyond the scope of this comment.
Absolutely well done and definitely keep it up!!! 👍👍👍👍👍
How do you exclude the fact that it wasnt the movement of plate tectonics that's making these shifts? There might be error in mesurements..
Ferm uitgelegd Brian!!
This explanation couldn't be better
Hello I have a question about this. How do you calculate the age of the waves??
+Samuel Villegas You don't. You see where the waves came from. If the source of the waves was a billion light years away, then the waves are a billion years old, because it took them a billion years to reach us. (If they traveled at the speed of light.)
Brian Greene is the man
If two different gravitational cross over each other and the peak of one wave lines up the valley of the other wave does gravity disappear? If a peak from each waves lines up is gravity doubled?
Yes and yes, though it's not gravity itself that disappears but just the effect you'll feel from the gravity WAVE. Gravity still functions as normal, gravity waves are just an extra bit. And yes, that extra effect from the gravity wave can be either canceled out or doubled, just like any other wave.
how do they know it wasn't faulty equipment? or just a property of laser dynamics no one detected before?
I have a question, what would happen if we could put Earth and Moon at rest and add feather on oposite side of Moon, so both could fall on Earth at same time. There shouldbe few possibilities;
1. feather and Moon would fall on Eart at same time,
2. Earth and Moon would exchange gravity fields, feather distance from Earth would first encrease and after it would speed up, because of combined gravity distortion from Earth and Moon.
If anybody know,i would appriciate short explanation.
but how come changes fraction of the atom big cannot be also be produced by temperature changes, or earthquakes or other environmental interference ? Other words , how they differentiated this real signal from false ones ?
what if you can ride thoses waves, gravitational wise...like using our poles or w.e
Hopefully the long explanation will come soon, somewhere on youtube c: