Brian Greene Explains That Whole General Relativity Thing
2015 ж. 11 Қар.
3 707 957 Рет қаралды
Theoretical Physicist Brian Greene explains how the universe works using a water bottle and disco music.
Theoretical Physicist Brian Greene explains how the universe works using a water bottle and disco music.
I love that Stephen seems genuinely interested in promoting science and intelligence.
+stiimuli I was thinking the same thing! He doesn't sit and only talk to useless 'celebrities' night after night after night....ugh!! I love this show :)
+AngeliaChanel Good point!!!
+stiimuli Yeah! He even brought out a special wagon for scientists! He is *AWESOME!*
Wouldn't you?
Goggle Toggle Unfortunately, many aren't. Including many tv hosts and youtubers.....and Texas government officials.
Meanwhile Jimmy Fallon is spitting water on celebrities.
right???? lol
Colbert holds himself to pretty high standards.
+shannon lyons murphy and gets massive views....what a society we live in....i'm still hoping that those are all paid views and society hasn't just embraced idiocy
+shannon lyons murphy To each his own. I love both guys and Jimmy Kimmel. We live in a great time for comedy. Lots of different flavors.
+OrigMedia some taste like shit, so i dont consume them. like jimmys childish comedy...
I'm glad Academics are getting more shine, so we can stop making stupid people famous.
Agreed. Case in point the stupid host.
Well said brother
Stupid people? Intelligence is relative too.
You can be stupid and highly entertaining, just as much as you can be highly intelligent and boring as heck.. I think we can agree Late Night shows are best for highly entertaining people, and once in a while they happen to be intelligent too
But muh sports beat yer sports!
“Space time is a four dimensional Hausdorff Differential Manifold on which a metric tensor is imposed that solves the Einstein Field Equations, and that metric tensor gives rise to geodesics and objects that are not experiencing any other force move along the geodesics described by that metric!” Holy crap that was a mouthful!
Thank you kind sir. I was hoping someone would have it typed out so I know how to spell it lol
Holt Burdette haha! No problem, I think another guy did it though too, but I didn’t notice it till I spelled the whole thing out. Wish I had known! Lol
ITS all about metrics there is nothing real. the universe is a hologram
Umm sir, we only talk English here.
@@thegreath.sapiensapien6907 Source?
Bloody love that Stephen puts science and non-cinematic arts right up there at the front of his show, brilliant host. Wish we had more emphasis on culture and knowledge in general media.
Marry Him
@@rock-tk1qf shut the hell up imbecile
@Stimulator7 well isn't America one of the most progressive , sanitary and educated place in the world ? .... In terms of corruptness I could name a few places worse than it ......
@@megametagrossard3342 America is no best anymore, scientific culture is actually better outside US
I like that he has scientists and inventors and leaders and other intellectual celebrities in. How cool an idea to honor Einstein and special relativity!
+QuantumBraced I agree. Stephen leads by example. Celebrating smart people creates heros of them. Our society needs to honor intelligence more.
+OrigMedia or it needs to ONLY honor intelligence and not useless 'celebrities'
+tonyatthebeach its society, intelligent people dont have to be social, while celebrities must, ofc there are people that are everything though :P
+gia I'm everything! :P I just need to make sure everyone knows it?? ps. good point
QuantumBraced it's good to have such honorable people since most of the time there's only bimbos around.
The mouthful basically means that everything always actually moves in a straight line - gravity doesn't **attract** anything, rather, it is able to warp that straight line into what we call a curve.
it warps the line in a way that creates gravity in which turn does attract everything to the centre
Hugo Desrosiers-Plaisance I would really REALLY appreciate if you could let me know some books that can help me understand a little more of how everything works.
@@Anon-tj2zk Start with Neil Degrass Tysons astrophysics for dummies. That'll get you going. And just start googling questions to supplement your interest. Make sure that the sources you reference are reputable, but have fun. Science and math are fun!
Jackie Johnson Thankyou so so much, I’m really grateful
TotalDrganMania thankyou, I’ll definitely look into it. Really grateful :)
"The ONLY rapper Eminem is too afraid to diss"
7:12 I need much more of this on tv!
yes
this is the last place i expected to see you here
Cosmic Nerd Studios I love Stephen Colbert! Gotta support other South Carolinians!
+NerdSync oh
No syncing please.
Finally a phrase to tell the general public how little they actually understand.
Yeah i wish it wasn't A issue and we had a way to come together
Humbleness is the first step to enlightenment.
@Justen Wennerberg It's way more than a bunch of scientific names, whole fields of knowledge and whole bunch of theories and techniques were referenced to. I have a PhD in Electrical engineering, and I have only a very surface-level idea about these things. These are not easy stuff.
You think you know till the end 😆
@Justen Wennerberg for a physics major, your comment hurt my soul
That 30sec explanation took me 3 years and a degree in physics to understand 😂
Only three!?
see.... you tube!
You are a genius ... majority wont understand in a life time ... Guess what, there must be physics teacher that don't understand it. They only reproduce it for their students to figure it all out by themselves.
Ahh finally I have a life goal now. I wanna understand what he said
9/11 question... Do you know why a feather and a bowling ball dropped in a vacuum from the same height at the same time will reach the ground at the same time? The answer is because while in free fall they both weigh exactly the same, zero weight, and there is no force acting on them. So where did the weight and the force come from to destroy the twin towers when all of that weight was supported for 30 years? The NIST answer --> "Since the stories below the level of collapse initiation provided little resistance to the tremendous energy released by the *falling* building mass, the building section above came down **essentially in free fall**, as seen in videos"...But free fall means not **falling**, and it also means no weight, and no force. --> kzhead.info/sun/eJhsXaeerJ17mqs/bejne.html
"it's up to you man, go nuts." Is that what the gods look like when they're creating universes?
Hint, humans are gods and no one created the universe, it happened.
Puro, I sometime have this similar thought that God could be the evolved and transcended collective human consciousness in future and we are just it experiencing it's past through the flow of what we call time! But the trouble is, as always, what came first! And the cycle goes on!
No sir, God is flat earther.. he created the earth with four corners.
Well, the gods were bugs bunny n friends from loony toons, so....yeah.
Ok
I FUCKING LOVE that Stephen is sharing science knowledge with us !!!
His name is right there, and still...
+Carl Rice He also has another documentary series called The Fabric of the Cosmos. I highly recommend it.
+Tr4cK17 Look up a show called Space TIme here on youtube.
Yes, I'd recommend the (PBS) Space Time channel too. I've been watching it quite a bit lately, with the result that I actually just about understood what Brian Greene said at the end there. And I'm no Sheldon Cooper, so they're clearly very effective videos. :)
Newton: I'll leave it to the consideration of the readers Einstein: Hold my moustache
Omg I laughed so hard lmao
What you say???
*Hold my trampoline
These hold my shit comments are getting old and annoying
@@ehaitem ok then
I love Brian Greene soo much. He’s so passionate and seems to love teaching, he’s like a kid with a new toy. We need more reverence of figures like him and not celebrities that contribute nothing to society as a whole.
He looks a bit like Einstein if Einstein didn't have mustache 😃
Wow that stopping of water flow of dropped bottle is the coolest thing I've seen. Just that one short demonstration opens up a whole vista of understanding!!
Question, is saying "dynamic effects" in this NIST document the same as saying "dynamic weight"? My understanding is that objects falling "essentially in free fall" would have very little weight of any kind with respect to their "static weight", or any falling objects that do not "slow" as they fall, can only have a maximum weight of a "static weight"? Am I right or wrong? NIST WTC Towers FAQ 31...? Quote word for word... "Since the stories below the level of collapse initiation provided little resistance to the tremendous energy released by the falling building mass, the building section above came down *essentially in free fall*, as seen in videos. As the stories below sequentially failed, the falling mass increased, further increasing the demand on the floors below, which were unable to arrest the moving mass." "In other words, the momentum falling on the supporting structure below, which was designed to support only the static weight of the floors above and not any dynamic effects due to the downward momentum, so greatly exceeded the strength capacity of the structure below that the structure below was unable to stop or even to slow the falling mass. The downward momentum grew larger directly proportional to the increasing falling mass." Now can you envision a falling bottle that falls faster and faster and at the same time the water squirts out harder and harder? This is what the USA government is telling you happened on 9/11.
You've never seen that before?
@@MeltedToast84 No
Albert Einstein says that space-time is a four dimensional Hausdorff differential manifold on which a metric tensor is imposed that solves the Einstein field equations, and that metric tensor gives rise to geodesics, and objects that are not experiencing any other force will move along the geodesics described by that metric! *throws punches*
+Arkadiem Hausdorff not housed :p
+Arkadiem Also, tensor, not tenser.
+1ucasvb Thanks guys, sorry if my misspellings made you feel tenser.
+Arkadiem It's the most concise, non-dumbed down explanation of relativity that I've ever heard.
+Arkadiem no _or_ between Hausdorff and differential
I just love, when someone is hyped about something. I'm not that much into science myself, but if someone starts to tell me about something science-related and he just seems as happy as this guy, I'm really starting to get interested.
+Xeno Fractal sorry, not a native speaker...
+DizzyDC its all good. Science is sick though.
+Xeno Fractal Everyone knew what he meant. Talking about the commas rather than the content is just pedantic and insulting.
+Patrick Foley edgy
That's me every time my nephew asks me a science question.
I'm actually really happy that Stephen asked that last question, now I have more Wikipedia pages to read xD
My first thought after I heard the answer
Yea I was like ok I need to look up what all that is and means. I like Colbert brings in science professors and even ask them not to dumb it down but challenge us to understand.
My thought too, and my greatest hope is that he did that recognizing the world of resources at the everyman's disposal today. And what do you know, a few comments up someone's typed it up so you even know how to spell everything right. Now let us go, and learn and make merry!
BTW one thing to note - the explanation using the rubber sheet is misleading and wrong in many ways. It seems to assume relativity is only about space being affected by mass and shows nothing about time. I am not gonna explain all that here but if you wanna know why check out Veritasium's video on relativity.
@@crimsonstrykr I agree with you. It is not entirely wrong, there are just better ways to demonstrate the theory.
i truly love how everyone is just 100% invested into this. makes me happy. 😁
The end was fantastic. So good to not dumb things down!
52 people loved this sooo much they turned their phone upside-down to like it again!
Gurpreet Singh Matharoo no they didn’t
They’re called flat earthers
Gurpreet Singh Matharoo. Lol good one. But sadly reality is that these people are flat earthers and they need this dumbed down farther.... to say a pre-born.
Gurpreet Singh Matharoo I liked your comment so much I liked it twice
IM STEALING YOUR JOKE
Very good thought to invite such wonderful brains to the show and spread the knowledge in enjoyable way. Great show. Thanks.
Watched this a bunch of times and Brian Greene still amazes me. A very wise science communicator
If anyone hasnt read Dr. Greene's book "The Elegant Universe", i cannot recommend it enough. He is able to explain the most radical nuances of quantum mechanics, string theory, theoretical physics and so on in the most beautiful, simple and thought provoking ways. Him, Michio, and the great Brian Cox are truly the stewards of the highest forms of sciences today.
Brian Cox on Joe Rogan's show was great
String Theory still does not function. It is a waste of time. Feinman lectures are better, more entertaining, and do not pretend to more knowledge than we have - but do support quantum theory whose calculations work.
@@artimp152 i’m going to bet that you just heard string theory was bad from a youtuber and are regurgitating their opinion and that you don’t have a degree or any experience with physics
I did read his book The Elegant Universe. I also watched his 11 hour lecture on General and Special Relativity. To his credit he takes complex ideas and make it understandable to a lay person, who is not good in Mathematics, like me.
@@EHS611 I also watched that lecture, I was amazed at how engaged I was throughout the whole thing. The understanding I had coming out was awesome. He's a true educator.
People like this gentleman here are the real celebrities of the world!!😉
We need this more on TV!
Absolutely
Excellent job by you Brian! Keep teaching us, we need it!
Brian, you did a great job explaining something so intricate such an elegant way. Hats off to you
His book "The elegant universe" completely changed my life. When I finished it I thought "I was blind and now I see" lol
Is it simple or u have to know physics or maths to read it ?
HarindeR SaharaN Some basic understanding is handy but you don’t have to. The book is specially made for the wider audience to understand without any deep mathematical insights.
@@HarinderSingh-dy7pg And you can stop in every point that you don't undestand and searh a and you will learn more !
That book changed my life as well, read it in 8th standard and immediately decided to pursue sciences in IIT
The fabric of the cosmos also was brilliant for me, and all you need to understand it is a free imagination
I'm really glad that Stephen asked for the technical explanation. It was truly beautiful jargon.
Daedalus my foot.
The teacher's example: 4:28 The homework: 5:30 The exam: 7:14
Indian schools: teacher's example: 4:47 homework: 0:14 Exam: 7:14
cleverest utube comment
So fucking true!!
Trojan Pegasus +1 😂😂
O m G
Brian Greene is really, truly amazing. During quarantine, he had a video series on KZhead called "Your daily equation", which meant that every day he posted a video where he explained some physics equation so that we all could understand. In this way, he would connect us all while we were at home. Every friday, he even had a live stream where we could ask him about anything regarding science. In this way, I was even able to ask him about a few things 😀
Thank you for mentioning the series..... I really appreciate it buddy. ❤
But Brian Greene said the water is squirting out the holes because gravity is pulling down on the water. "Since the stories below the level of collapse initiation provided little resistance to the tremendous energy released by the *falling* building mass, the building section above came down **essentially in free fall**, as seen in videos"...But free fall means not **falling**, and it also means no weight, and no force. --> kzhead.info/sun/eJhsXaeerJ17mqs/bejne.html
Wow! Thank you so much!
From what I've heard about Einstein's personal life, there must have been stiff competition for the "happiest thought of his life."
+mariokarter13 yeah, Stiff competition
Miles Hayford He definitely worked hard to come to that conclusion.
+mariokarter13 You guys should be penalized for those.
+mariokarter13 It must've been hard, but he certainly rose to the occasion.
Evan Thomas I'm sure there's a loophole I could squeeze through.
Einstein would been like 'yeah!!! Give it to them, son🤙'
😂😂
A good teacher is always understood by others. This example made the whole concept clear as a bell for me. I got it!!! Thank you Dr Greene, and Stephen! A very good visual demo for both topics. Excellent!
I'm impressed by Colbert. Asking good, sensible questions.
Don’t give him too much credit. Clearly those questions were provided to him.
@@Cohdiboi I've only recently come across him tbh (I live in England) so don't know much about him.
He always has scientists and retains some knowledge, although a comedian, he still has excellent questions and some understanding which makes it all more entertaining. I love when the host has some actual interest in science and not just trying to poke fun at scientists.
And he didn't belittle Greene either, was clearly interested in his explanations. Most people would put down an intelligent person simply because they don't understand him.
Wow, he really does have the best guests.
I should have known that bottle example would do what it did, but was that ever cool seeing it in action. That was awesome! He is REALLY GOOD at explaining stuff like this :D
I love Brian Greene - he explains these complex things in a way I can almost always understand. I thoroughly enjoyed his books.
This whole segment was awesome
"Stand back Issac, Alby's here"- that was so 😆😆😆😂😂😂😂😂😂
The falling water bottle was an awesome way to demonstrate the equivalence principle. Brian Greene mentions very quickly that the curvature in time as well as space is important and doesn't go into it more, but he means something like this: the rubber sheet represents spatial curvature and you can slice spacetime so you have many copies of the rubber sheet stacked together. Moving forward through time forces you to move upward through the stack, but the *true* time direction you experience gets pulled slightly inward by gravity, so your overall motion arises as the combination of both space AND time bending toward the sun.
Steven Kapturowski Holy shit, thank you for that comment! It made me think deeper into the problem, and I think I finally got it! So basically, it's like time is just another spacial dimension, in which we are moving with constant velocity(which we preceive as time passing by) at all times, and the curvature, which mass produces, extends into the future(which is basically just a direction if we consider time as a spacial dimension), and the fact that objects with mass get drawn into that curvature is due to that constant movement in time!
Space time is freaky.
It's even stronger than that. The overwhelming majority of the acceleration we experience towards the earth - and everything experiences towards everything else - comes from the curvature in time specifically, not of space. Spatial curvature contributes to more exotic effects like lensing and black hole dynamics.
@@jmcsquared18 exactly I was just going to explain that. For the most part, gravity is just matter bending space so that relative to spacetime curvature, you're actually not moving through space at all but only through time when you and another object of mass accelerate towards one another. If we could think in four dimensions these concepts would be so easy and kindergarten level intuitive, but unfortunately we're stuck in our boring 3D 🙄
@@MrFlameRad Being stuck in three dimensions kinda sucks sometimes, but that's why it's fun to imagine :)
We need more of this in prime time and late broadcasts
Teacher: the physics exam will be easy The exam: 7:13
Exam change: you have to recite what Brian says between 7:13 and 7:32; you have one week to learn it! \m/ :)
common late show team, You have to pin this comment.
I love science so much and I'm so glad you're doing this, Stephen! MOOOORE (please)!
PBS Spacetime. Awesome channel, has a wonderful playlist on general and special relativity. GO NOW!!!
No u
Ur mom space
The passion he speaks with is so contagious 🙂
What a wonderful demonstration and vivid explanation by Brain Greene.
Brian Greene is the rock star of physics.
Devon Miller nope that's Brian Cox
wow .
Devon Miller there’s another Brian of physics. His name is Brian Cox. He also has a great way of explaining this stuff to people who have difficulty comprehending it.
Yes he is
And so is Brian May.
Brian Greene is leaving a great legacy of trying to encourage more awareness of science to the public. Great guy
The last part is pure flexing by professor Greene 💪
I love this segment!!!!
The best demonstration I've ever watched on the General relativity theory. Thank you!
7:13 “that’s the good stuff right there” 🤤
I very much enjoyed that mic drop at the end.
Brian's water bottle example helped me understand the equivalence principle a lot easier. That less than 30-second explanation at the end made my head explode!
"So Albert Einstein says that space-time is a 4-dimensional hausdorff differential manifold, on which a metric tensor is imposed that solves the Einstein field equations, and that metric tensor gives rise to geodesics, and objects that are not experiencing any other force will move along the geodesics described by that metric." In case you wanted to look anything up. ;)
@@guptadagger896 The "line with a double point" (two copies of the real number lines identified except at the origin) is a differentiable manifold but not Hausdorff.
7:12 Woah, that was a badass explanation
Oh i love it, this is remarkable promoting science to the people
I love Colbert's segments in science on his show. It's always very interesting.
Brian, you are a superstar scientist. I really appreciate how you explain and make modern physics concepts seem so easy to follow. Thank you.
FINALLY. I've been saying this for a while, I want smart people not to be cool by explaining this simple but by showing how incredibly difficult it is what they did and FINALLY someone gives the opportunity for people to take a peak in the mind of scientists and see how much work it is. I LOVE IT.
Videos should be made like this. It's so fun to watch while learning core concepts without even knowing. Great video. Bonus: (When you construct a joke using General Relativity) 3:20 The happiest thought 😂😂😂😂😂
this was truly an illuminating demonstration!!
Love it when they bring science to talk shows , very useful and intriguing
The advantage of having a smart host is that a lot of smart people get invited and get asked a lot of smart questions. That demonstration would help many laypeople get an understanding of how exactly gravity works.
Thaaaaaank you for this!!!!
3:31 -stephen be like - yeah man,I am like that...lol😂
your comment deserves my reply ahahhahahhahah
@@Egyptiangamer77 thanks!
7:12 That's a moment cap says to tony stark: speak english.
Yup, except of course that Tony Stark was just making shit up and Greene isn't!
Wasn't he speaking in english already?
I love Stephen for always giving so much time to science
First time I saw the water bottle expt I was in tears. It's so beautiful. So elegant. And so captivating.
The last part just blowed my mind.
Great guest.
can anyone tell me the episodes where he interviews or has guests that aren't celebrities(basically people who will waste my time)? This was informative and I'd like to see more.
You'd be surprised as to what kind of insights some of the celebrities actually bring to the table. They're not all just eye candy and gossip.
+kevokoma Yeah most celebrities are celebrities for a reason especially actors who have honed their craft to a phenomenal and mind bending level.
+kevokoma You should watch the one with Pewdiepie. It will change your life. His best guest so far.
+kevokoma you dont want your time wasted, dont watch a comedy show you plonker
+kevokoma Pretty much every episode, he does the Daily Show style routine, has a celebrity, and then has a political person, or science person on. it's a mix. He basically turned the late show into The Daily Show.
Brain is absolutely both intriguing and entertaining. Thanks, ❤Todd
I m seeing this video after four years...since u uploaded!!!
Brian Greene is awesome! I love his documentary on String Theory!
If only every teacher and professor of science was this exciting and passionate!
I love this. It’s beautiful
OMG I finally am able to understand this theory!! I never thought it would happen :-)
stephens a hell of a host
7:38 "That's the shit right there" saying it while pointing at the science guy!
I'm so glad I clicked on this. That experiment was epic
When my mom walked in I immediately switched to porn cause it was easier to explain.
Underrated comment 😂🤣
@@SRVarma1993 copied comment.. ^^
G-string theory
@@RSBLMC92 wtf XD
Hold Up 😱
Professor: **says something no one absolutely understands** Audience: 👏👏👏👏👏👏👏👏 Story of my life in college
"Absolutely no one" would structure a sentence that way. Are you sure you're in collage?
@@spacewitchvulcan English is not everyone's native language.
@@spacewitchvulcan Technically his sentence was still correct, since nobody _absolutely_ understands general relativity and physics. Honestly though people make mistakes. Not every sentence gets typed out perfectly, sometimes we make errors in spelling and grammar, and sometimes we just have a brain fart and type some stupid shit. So I personally try to avoid correcting anybody on stuff like that. The only time I really "correct" people is when they are spreading lies or misinformation, because that bothers me far more than somebody mixing up "their/there/they're" or something else along those lines.
@@spacewitchvulcan Next time you're correcting somebody, make sure you're not misspelling *college* .
You didn't have to clap, you know?
Einstein after reading newton books on gravity be like "hold my beer"
*papers
More like "Halte mein Bier" as he was German XD
*beer slips from hands and falls to ground without spilling until it crashes in to floor* Einstein: This gives me an idea....
Or "hold my photons"
He didn't drink so....idk
This is beautiful, how pedagogy has evolved in different ways.
I watched this video when I was in high school or in the first year of my undergrad. Today, KZhead recommended me this video again, and now I can understand what Brian Greene's last sentence means. I'm a second year graduate student, and I feel good.
4:03 that single dude that started clapping XD
The world needs more show like this...
This was well done
It's a great video. But the end was awesome.
Thank you, Stephen, for promoting intelligent education. 🤓
Very beautiful summary at the end😂
So beautiful video, I can't express my words. 😁
Although , I wonder why no one asks in the curvature of spacetime demonstration that why everything in reality don't fall towards the centre .
Please continue to have scientist on the show. Brian Green is a Star amongst nerd circles.
SO. FUCKING. AWESOME
I loved the question about not dumbing it down. I get that feeling that it is really not emphasized enough that science has so much more to it than popular science and it is also worth it to know some of real physics and maths not just easy understandable models.
I really love Stephen for actually asking Dr Greene to say that at the end. Brilliant stuff.
It was rehearsed
Hey if you guys want to understand more about how special and general relativity works, how humans' thoughts on the matter have evolved with the work of Einstein and other key scientists, or if you just need more examples to try to really wrap your head around a lot of the concepts, check out the Space, Time and Einstein course at www.worldscienceu.com. Brian Greene does a really good job, and the courses do a great job at making these mind blowing things relatively easy to understand.
Tommyhillpicker how about you go and fuck yourself! I tried accessing your shitty adress and all i found is some crap for register for the courses and shit like that.
@Den Ax Dude, Well, all you have to do is register for a course. But it's completely free. And the series on special relativity is the best I've ever seen.