TEDxWarwick - Sir Roger Penrose - Space-Time Geometry and a New Cosmology
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- čas přidán 27. 07. 2024
- Sir Roger Penrose is one of the world's leading mathematical physicists. He is also joint winner of the Wolf prize with Stephen Hawking for their contribution to our understanding of the universe. Some of his discoveries include Penrose Tiling, Twistor theory and works about the geometry of spacetime. He is also a recreational mathematician and philosopher.
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Utterly brilliant. If there's anyone who knows and understands all we know so far, it's Sir Roger. He is the scientific establishment. Cutting edge stuff.
So incredible to see Professor Penrose win the Nobel Prize.
One of the greatest minds.
Penrose’s hand drawn illustrations are much more comprehensible than any fancy 3D CG I’ve seen in any book so far.
For all that want to know more about these light-cones, check the wikipedia-article "Minkowski space". Penrose is basically using Minkowski diagrams all over the place, describing them in very simple terms, but really Minkowsky space incorporates much of special and general relativity.
For people familiar with special and general relativity, his diagrams using minkowsky space look familiar, and for the rest there is still a chance they might be able to follow.
I like this idea of a cyclic universe very much. He's a brilliant mind.
I think at least some people in attendance do understand and have seen it before so already know the material; then this summary is appreciated and they are glad to have seen him speak in person.
Admiring people is not lunacy. Certainly admiring thinkers is less so than admiring athletes!
Enjoy, Tai Chi.Much? I fail in sentence structure excuse me.
Hes explaining the creation of the universe, the Laws of Thermodynamics, and the singularity. And the technology hes using is a projector. That basically sums up the human race if you ask me.
+Holes Johnson Yeah, sure, that's the whole human condition right there...
+Holes Johnson LOL.
The shitty camera work and subsequent lost info sums up the human condition and likely fate.
Excellent but the idiot that taped it showing our professor and not the diagrams and this weird back and forth shots killed it, and me...
+drnmalek I agree the professor was a great speaker Ted need to provide the talent for taping and electronic presenting as mentioned above PowerPoint.
kinda like those old rock concert videos when the camera always focuses on the drummer during a guitar solo
I always love that word, 'PARADOX,' which is really just a substitute for we don't know what the heck is happening. As if the universe really consists of paradox. The word 'paradox,' is merely a stop gap fill-in for lack of understanding- 'this phenomenon behaves 'paradoxically.' So the trick that the mind plays on itself, the short comings of our own thinking 'paradox' label is applied to the workings of the universe itself.
It's going to be an exciting year for Penrose's cyclic model, and all theorized models of cosmology with the new Planck satellite data finishing up near the end of the year.
Penrose is awesome and so are the visual representations he draws up. Audio could be a bit better, but still fascinating!
Excellent discussion of space-time cosmology and the possibility of a cyclic universe.
William Letzkus space is fake research flat Earth
i wish they would not have just followed him back and forth ignoring the transparencies he was putting up. it actually ruins the lecture.
He's probably the only world famous speaker that draws his own slides with color marker pens! Not just a brilliant mind but also a talented illustrator!
I just love his wry humor. And his excellent style of writing.
Thank goodness you proved him wrong. Certainly something Penrose didn’t consider ;)
At the end of an Aeon the universe only contains massless particles buzzing around at the speed of light, isotropically distributed, exactly what you see in the cosmic microwave background, in the next Aeon. That’s how I understand it.
It’s a conformal rescaling operation, so to speak. Rescaling infinity and singularity such that they ‘match’. Similar to renomalization operations in particle physics.
@evelauds
Roger Penrose draws them himself, and compared to other theoretical physicists he is very good at it.
OMG! I'm seasick! Following this cameraman
I love how honest he is about (theoretical) physics
A lot of what we know about black holes today, was kicked off as a result of the collaboration over several years between Roger and Stephen Hawking. Just brilliant!
Oh - I forgot to mention - if Roger had got the hang of Powerpoint, I think his profile would be much better known!
There once was a lady named Bright,
Who traveled much faster than light,
She started one day in a relative way,
And returned on the previous night!
What shape is the Universe in?
The Universe is in Great Shape for an Old Universe!
I need those slides.
Great lecture by a great man!
Probably the only guy who beats the crap out of the average hipster TED narrator with his overhead projector
I thought the big crunch might be a viable idea because the phase change state of Matter at the end would be cold , run down and chaotic. It wouldn't be Matter any more. So, as Mass-less cold stuff it could act as he says at the end. The new thing is to say when this happens the universe just bangs again.
A great talk packed into 20min but I really wanted to see what was being pointed out on each of the many transparencies, while it was being pointed out.
Always show the speaker rather than the diagram when he/she is pointing to something on it. This helps tremendously with following the lecture.
jump to 20:43 for the kicker.
Uno de los mayores científicos de nuestra época, ¿y nadie se ha dedicado a traducir la conferencia?
Always bring three video cameras to a Penrose lecture. And maybe more than one microphone.
@Ekryton yes - it's sort of fun all those different colours and his scrbbly writing. His books although containing 'proper' computer graphics also have the occasional rather obviously hand drawn sketch.
@[17:23] "Any [massive] particle is basically a clock."
*"If you take the particles away, if you just have massless particles like photons, there's no way of making a clock."*
Then *Time is an emergent property of Matter.*
+Craig Brownell That seems like a solid inference but there is a real concern with only worrying about time when we are really dealing with time as only one of four interconnected dimensions. The concern is that time need not in and of itself be a physically real object. We can compute stuff using this concept of time and parameterise fields in time, etc, but when pressed to examine what time itself is like, it turns out to be a relativistic quantity and not invariant. That is surely a problem for anything emergent from other causes, it should be an invariant as well or it is not in and of itself an invariant property of anything.
What you would need is for *intervals* to be an emergent property of matter, then you could reasonably say that the thing which emerges seems to hold good for everyone observing it and as an invariant it has a more impressive case to make for being a real physical thing and not some human convenience.
@MrBTie: They shouldn’t invite theoretical physicists, then. Hawking might sometimes be funnier but after a talk by penrose I feel I have actually learnt something. By the way, Penrose is a very humorous man.
@MrBTie The think you don't grasp, probably you haven't read anything from Penrose is his ability to illustrate visually concepts that a regular physics book would make appear as something totally incomprehensible and simply unreachable to someone with not that academic affinity towards physics.
I think that every single of his old-school slides is a brilliant piece of art. This is a unique way of giving a talk.
What's the point of your comment?
Thanks !
Very bad audio in this video, but the contents are great.
consciousness would simply be data streams sent to a charactor in the simulated environment, and the objective would be that through each life lived the consciousness would be able to extract information through experience, and advance the larger conscious system by dividing into individual units of consciousness to experience reality one life at a time. this would be called a BIG theory of everything.in that reality would be probabilistic not objective hence wave particle duality and the rest
WHY DO THEY NOT SHOW THE SLIDES MORE?!?!?!
So at the very instant of the big bang parallel big bangs were created as well. Interesting...that's actually possible according to qft.
In the realm of cosmology it is hard to verify theory as so-called "fact" without testing predictions, itself not an easy task in such a domain.
Speculation leading to belief is the mistake of the believer not the speculator. Speculation is an enumeration of what is possible, without doing so leaves you standing still.
Science will always fail to fully capture reality, and belief is always temporary until a deeper understanding is made.
Feynman is still the king of this! That is, the king of taking science and making it intuitive.
Penrose diagrams are to black holes and wormholes what Feynman diagrams are to particle interactions and Minkowski diagrams to reference frames: Indispensable and conceptually suggestive.
Penrose gets schlack these days for quite a lot of controversial ideas, but he often has a point,
I propose a new theory of cosmology that no one has thought of before:
When the Universe expanded after the Big Bang it expanded into a Donut Shape with Nothing in the Center! Just like blowing a smoke ring! Only the DonutShape would be circular! I bet Rodger Penrose didn't think of that one! New ideas deserve to be publisized!
Got to love him for that as well....although someone should introduce power point to him ;)
So, are we in the Aeon of Horus then?
Why zoom in on him when he is moving around like that?
So my brain cells can do jumping jacks and the reason is watching this
Yea, and someone should give an electric guitar to Yoyo Ma. That Strad' of his is like hundreds of years old, right?
anyone willing to speculate on anything will never leave me satisfied...
Watch the video "Feynman - The Key to Science". That will set you right.
genius. (and correct)
Can we get a translator in here please!
E=m*c^2 solving for m, m=E/c^2 not m=sqrt(E)/c
interesting!
A brief history of the Universe, I believe the Universe may be cyclical! What example could I use? Imagine shooting 1000 billiard balls at the center of the table at the same time. Now imagine 1, 000, 000 billiard balls! Now imagine 1, 000, 000 galaxies collapsing towards the center of the Universe at the same time! At nearly the speed of light they would immediately change from Matter into Energy, which would then expand outwards! This is called the Big Crunch!
The Big Bang theory is based on a misinterpretation of redshift. The redshift of a distant galaxy is measured in the light coming from that galaxy. Lines in the spectrum of that galaxy show a shift toward the red compared with the same lines from our Sun. Arp discovered that high and low redshift objects are sometimes connected by a bridge or jet of matter. So redshift cannot be a measure of distance. Most of the redshift is intrinsic to the object.
Great lecture, but the video could have been better. One hardly has the time to study his foils and the close up makes it look hectic and unsteady.
"This is what we know," Penrose says. But it isn't even close to what we know... it's just what Penrose and some of his buddies in other positions of authority believe they know.
That same authority, science, gave you every tool you have, including the one you typed this on. As far as authority goes, it's top dog.
propoetide No it didn't; people's creative actions did. Science is a tool, which uses a method, which has intrinsic limitations that certain "scientific authorities" are unwilling to acknowledge or even consider. Science does not, and can not, have truth by the jugular. It is no meta-theory.
TBP 2014 I've read Emperor's New Mind and its actually about that same thing. It's funny you should say that about Penrose of all people. The man is criticized for bucking convention at nearly every turn.
harrisonmesko Now I'm no "authority" or "expert" on Penrose's work, so could you give a specific example?
+propoetide Really too bad that they don't teach the Art, Music, Science, and Math together anymore. It was more than science that gave us what we type on. Specifically the computer was designed for the space program, latter it took imagination and courage to create it for home use as they originally used a TV for the display. Which couldn't have been used if it hadn't been for the closed circuit technology for the TV. prior to that it was tubes and that could have caused injury if improperly removed or assembled.
you know i really like Penrose,when other physicists starts acting irrationally coming up with 10 dimension space time and nothing-less beginnings then he always came to the rescue with logic and reason.
but then he ends this video with these words...
"...the universe has two boundaries, one in the past and one in the future. And we can speculate that it was a succession..."
The universe is finite with a past future boundary, so we SPECULATE it existed forever?
really Penrose! I'm disapointed
Penrose said he does not believe in "inflation"... Interesting...
Thumbs up if Penrose has just saved this Universe
A brief history of the Universe: I believe the Universe may be cyclical! What example could I use? Imagine shooting 1000 billiard balls at the center of the table at the same time! Now imagine 1, 000, 000 billiard balls! Now imagine 1, 000, 000 galaxies collapsing towards the center of the Universe at the same time! At nearly the speed of light they would immediately change from Matter into Energy, which would then expand outwards! This is called the Big Crunch!
josephsiler1946 Look at this video and see Penrose explain that a big crunch would not give us the picture we do see of the cosmic microwave background noise.
imagine just for a moment that this is the case. now analyze what we know about quantum mechanics Newtonian physics and all the rest in that context it fits doesn't it?
"A stupid man's report of what a clever man says can never be accurate, because he unconsciously translates what he hears into something he can understand." ~ Bertrand Russell
Why didn't the professor use PowerPoint? Hilarious!
Peter Perfect I have never seen a powerpoint presentation work that well when jumping around to different pages live like he was doing. Plus can you imagine how much time he would have wasted?
+0ooTheMAXXoo0 Actually I create PowerPoint presentations and they would work well with that presentation possibly better, because of the jumping around and back to previous pages, they could be duplicated and set up right in sequence. Ted needs to bring everyone up to speed electronically and assist with presenting. It look more like a lecture.
+Peter Perfect never see him use powerpoint. once he did have some trouble with having to navigate through a few CMB images on a windows desktop computer. but using slides is a Penrose thing, and he is very good at drawing pictures that can effectively express his ideas, and these pictures present in his books as well, and they always work quite well.
why cant he stand still? D:
+ShadowEcto A significant fraction of people tend to think better and learn better when not sitting in one spot at a desk - it could just be that.
Ever watch a Lee Smolin lecture? He sits still but one arm is like a perpetual motion machine. It is like his hand is excavating invisible ideas into his mouth.
Because he has to keep feeding two very hungry overhead projectors.
If the Universe were Donut Shaped then the visible Universe would be a little circle in the middle of that Donut Shape! The visible Universe We see would be only one twentieth of that Donut Shape! And if the Donut Shape were circular then what we see would be only one two hundredth of the entire Universe! We are very small and the Universe is very, very Large!
Is that a kind of conspiracy against the 'outsiders', to focus the camera away from the information being projected on the screen? Everybody in the audience is looking eagerly to the screen where the great professor shows something interesting about black holes and related stuffs. But in a matter of seconds the information disappears completely from the horizon... for online observers. Only the last picture entitled "Conformational Cyclic Cosmology" was projected long enough (21 seconds) to be retained. All the others have length between 9 and 13 seconds, too quick for me.
kinda
powerpoint and a light pen..genius guy, bad materials, great illustrations.. but he can ge a really nice 3 d model from an undergrad for free.. Cmon son!
So you're willing to make that speculation? You must have been willing to speculate that readers of your comments will find them interesting. Or am I speculating too much?
Why would you call him a recreational mathamatition ? He was the Rouse Ball Professor of Math at Texas University for a tiime not a recreational occupation a professional one,
You can't even make out the words of the slides! It's a shame someone didn't help him expand them digitally so everyone could see what the hell he was talking about.
His watch beeps and he then realises he has to cram the conclusion into less than a minute, not an easy task. Watch the longer version of this talk and you might be less dissatisfied, I hope so anyway.
@DEBUG1984 no one. you're right. i am wrong.
Actually Homer Simpson thought of that one before.
You laugh at the Big Bang? The data points are literally so close to the theory's prediction that we can't tell the two apart.
He's a trip!! 😇
you know Penrose is the guy who *among many other things - proved (mathematically) that Einstein's General relativity collapses at the centre of a black hole. When you are trying to explain things that deal with the limits of science as we know it you can either stay in ignorance and say "God Did it" or Speculate (by using of-course a complimentary solid mathematical framework to back up your speculations) Penrose is allowed to "speculate" my friend.
worst produced TED talk I've ever seen. too bad because he was quite interesting.
He's like a hyperactive 9 year old.
Video is mostly trying to track Sir Roger Penrose moving around rather than the diagrams which are flashed up for only seconds but deserve time to understand. All documentaries are ruined by focussing the speaker rather than their subject.
+de fet Sure, except that he's a genius.
The Universe can forget its mass... but it cannot forget its entropy... so this doesn't work...!
Entropy personified
Agh i feel so stupid
Why he doesn't believe in universe coincidence then?
imagine that your a charactor in a video game on the playstation 72 and you have a simulated reality governed by a back story (big bang) and so called physical laws etc. the real truth would be reality consists of a data stream sent back through the joystick your controlling. what evidence do we have that THIS reality is NOT a simulation? and if it is objectivity becomes irrelevant.
There are so many things wrong with this talk that it is hard to find a place to begin.
1. The Entropy discussion comparing gas in a box and the universe. Very bad analogy and causes complete misunderstanding for lay people. Modeling the universe as a closed system is just wrong. The reason why the gas reaches a state of complete equal distribution is that there are interactions of the gas molecules with the walls. How many stars or galaxies do we see banging off the walls of the universe?.
This is too advanced for me.
the reason gravity slows time down is because it keeps you from expanding with standard time. Time is just like russian dolls. When you die you lose your connection with expanding matter. You fall out of sink.
You fall in sinks.
right now your in sync with the exspandtion of the universe when you die the ability of your soul to synchronize with this expansion stops.
Jesse Reiter soul? whats that?
Magnetism is just a result of special relativity. And soul is the rubber meets the road or where our mind reacts with our timeline.
+Jesse Reiter I disagree with your theory of when you die. The soul isn't synchronized with anything of this earth. However your body organs are, fine balance that they exist in. Your soul is the driving force not the other way around. First to exist and First to exit.
i'm forced to disagree, speculation leads to things like believing that the earth is flat, that the sun revolves around the earth, that man comes from monkeys and that were just part of an endless cycle inside a multiverse... I'll stick to actual provable facts! that way i avoid making myself out as an idiot just because i desperately want to cling to some sort of belief system...
Speculation is a necessary evil sometimes, unfortunately.
It's awful how that kind of thing can ruin a whole talk.
Brilliant man, but a lousy speaker.