WSU: Space, Time, and Einstein with Brian Greene

Join Brian Greene, acclaimed physicist and author, on a wild ride into the mind of Albert Einstein, revealing deep aspects of the world that defy everyday experience. Using a visually rich canvas of animations, Greene leads you through all the startling conclusions of special relativity, from time travel to space warps to E = mc2. In the span of 2+ hours, this short master class will change your conception of reality.
This is a mostly non-mathematical version of the WSU Master Class “Special Relativity with Brian Greene.” • WSU: Special Relativit...
#WorldSciU
0:00 - Start
The Special Theory of Relativity - 00:05
Speed - 00:05:50
The Speed of Light - 00:18:23
Relativity of Simultaneity - 00:27:42
Time in Motion - 00:37:42
How Fast Does Time Slow? - 00:47:49
Time Dilation: Experimental Evidence - 01:05:31
The Reality of Past, Present, and Future - 01:14:37
Time Dilation: Intuitive Explanation - 01:28:38
Motion's Effect on Space - 01:32:34
The Pole in the Barn: Quantitative Details - 01:49:48
The Twin Paradox - 02:10:39
Implications for Mass - 02:19:17
Special Relativity - 02:29:06
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[@i2ohit]

I wanna confess something, Brian greene's youtube content helped me get out of depression, honestly

[@MyKneeHurts]

good to hear man, hope ur doing well now!

[@stylis666]

He has that effect on people, so I hear. Okay, I didn't hear. I have bipolar disorder and when I'm depressed, learning more about relativity and quantum physics from Dr. Greene is one of my goto methods of getting out. That and cheese spread with sambal on bread and watered down banana juice. I just love that crap XD So if I don't feel like drinking or eating I eat and/or drink that and the taste makes me want more. Physics is just exhilarating. It takes little effort to sit down and absorb it and it just makes me happy and not even a depression can stop that from happening. Like my cheese spread and banana juice but for the brain.

[@miguelmartinez4023]

O

[@miguelmartinez4023]

@@MyKneeHurts i

[@charliec244]

Seriously though, this lockdown has brought me to more science contents to watch. We have Brian Greene, Sean Carroll's podcast with lots of leading scientist in physics or other topic, and also Royal Institution videos.

[@user-lr9bj9yo8s]

Isn't that a miracle that we can watch this incredible lecture by world's leasing physicists for free at any moment in spacetime ! We are so lucky !

[@user-tx9lx6xy4h]

agree

[@agneswiborg7135]

I agree

[@GaioBardelle]

Z

[@xxoopusiecatooxx]

@@socialmeaslesinpartnership1252 then why are you here? Over 2 hours you either didn't watch it all, or were interested in it enough to watch it.

[@simplebike2230]

Wait to watch mine

[@robinaelliot8588]

Best delivery of a time dilation explanation ever. Couldn’t leave til the video finished, totally glued. Awesome Dr Greene. Awesome and inspiring.

[@ajoebo9095]

Greene as a teacher to a layman like me is breathtaking, phenomenal and rare to encounter. Almost if not entirely one of a kind. I say entirely because this gifted teacher just gave a lecture on a difficult subject to understand to a non-physicist and n0n-mathematician just like me: the conceptualization of Special Relativity. Nobody in my book has explained Special Reavity and what it means in practical terms the way Green has. Outstanding!!!!!!!!!!!!

[@stevemuturi965]

Greene is good, DeGrasse Tyson is great, Carl Sagan is the one you should be looking for; "Cosmos", my young Padawan!

[@ralphclark]

@@stevemuturi965being dead, Sagan won't be able to reflect a current understanding of these topics. And even at this dumbed down level, some important details of the interpretation have changed since Sagan went away.

[@josephsmith6777]

I was told if you can't explain the general concept to a 12 yr old it may be completely wrong

[@ralphclark]

@@josephsmith6777 that’s more about the depth of your understanding and your ability to explain it at various levels. It doesn’t mean that any truly accurate model of the universe is necessarily going to be fully comprehensible to any human, let alone a twelve year old. The universe owes us nothing. And our brains were shaped by an evolution to be just good enough to enable us to pick fruit, hunt wild game and get through an ice age. There was nothin in there about being able to perceive ultimate reality.

[@josephsmith6777]

@@ralphclark no but u can explain the solar systems basically to a 12 yr old I learned newton's equations in 7th grade so the same way green describes huge equations and the connection to live experiment the basics aren't terribly hard to explain 😀

[@1halnass]

Can you imagine what we could accomplish if we all had teachers like Brian Greene?

[@vinnyhorapeti2461]

The secrets of universe

[@xdalic]

Flat earth people wouldn't exist.

[@TheCJUN]

We should clone him. A million Brian's should be enough to shift the pendulum in humanity's long-term favor.

[@joebflies]

Hopefully find a better theory then sting theory

[@shortcutDJ]

what are you talking about , he's right there. can't you see? we have him as a teacher? What's holding you back?

[@sandbach7195]

I love falling to sleep with these ideas....its very relaxing.

[@psyclotronxx3083]

I do too

[@drewandrews8673]

My everyday routine!

[@paulvascone3435]

Me 2.... N I suck at math...,🤷😉🤘🏽

[@santosteixeira76]

The best way to fall a Sleep!, 💪💪

[@eS.white.]

Doing it right now

[@school-of-hard-rock]

The first book that ever properly made sense to me and got me hooked onto Physics is The Fabric of the Cosmos! Thank you Dr.Brian Greene. 😊

[@jeffcolebrook]

Now hooked come check out The Resonance Science

[@davidmudry5622]

If constant velocity is the same as being at rest for things made out of matter having mass, then why would light behave as if it was at rest if light has no mass?

[@saltybits9954]

What a waste of money.

[@Slaphappy1975]

Thank you for sharing this. Brian Greene is just the best science communicator. Sometimes im so thankful for KZbin.

[@dimitriosfromgreece4227]

Yes AMAZING VIDEO ❤️❤️❤️

[@hennersss]

Praise the lord

[@cFull_Rtrd]

Every night i go to sleep watching youtube, doesnt matter what im watching, i will wake up in the middle of the night to this video

[@ryanhaller8896]

Dude... same.

[@nurk_barry]

Same happens to me on a different video, similar subject matter, usually Sean Carroll videos.

[@chrismurray600]

@@ryanhaller8896 6k

[@millianzachary298]

I fell asleep watching youtube and this was the last video that had been played. Maybe it's youtubes way of checking if we're asleep

[@tonyrizio8921]

Same here, crazy. Why?

[@spiderrico7709]

I never went to high school. Theoretical physics, subtopics particals,, quantum theories attract my imagination n I'm so grateful these videos explain so much of the questions I've been asking myself for years.

[@jesuschrist.6006]

Do not worry, even if you would have gone at high-school, the rotten teachers and fked up no life kids who's parent never bothered to help them make a difference between right or wrong and much more, would have sucked out everything good from you, just do you and learn now with the tech at hand, what you really like, every word every sentence you Don t understand from these kinds of videos, just search them and see what they mean, memorise it and go on to the next YOU thing.

[@HowardBaileyMusic]

I know what you mean. I left school without finishing grade nine to go to work. KZbin is school these days. I remember having to go to the library to look for things I wanted to learn and even that in itself was a challenge. Now in just a couple minutes I have a choice of ten specialists to choose from to show me what I want to know. Such a wealth of information.

[@nikitagloukhovtchenko6857]

What is theoretical physics to you? What counts as gravity and a valid theory for gravity?

[@neilrutherford4038]

You were great in Rocky.

[@tharsikanarul2153]

university = memorize training center bring something new to the science : )

[@novahina]

Only If I had more teachers like this. Your teachings are excellent. I have never ever had a physics class like this. My professors would always bully me with students.

[@cynthiashepherd7754]

Everyone needed a professor like him, someone who lives a good speaker and could keep you interested in the subject.

[@novahina]

@@cynthiashepherd7754 Yes, indeed Cynthia Shepherd.

[@siriboonkotchaseth297]

Hi. Prof. Brian Greene. In the beginning, recently, I watch your program by chance. But now, I am hooked and become your staunch follower. Your lectures are very interesting and enjoyable even for someone who does not have any background in physics or cosmology. I feel you are giving lectures on cosmology like reading a poem. I love it, sir. I am watching from Thailand.

[@tommustric2492]

I am somewhere watching between the East and the West: relatively in relative world views consideration for "change" vs. for measuring what is the highest value cross culturally or what it means to "know" something (epistemology), Orr what is logic as understanding "process" by the axiology of our values as may be seen by the cohesiveness of the group herein as astro physicists non-technically!

[@tommustric2492]

The major world views hold axiology to advance questions of what is the highest value cross culturally, what does it mean to know something, snd what is change, and what is logic. The psycho linguistics in aspects of cultural differences suggest the Whorfian Hypothesis ststes that no two people have the same view of the real world view in the same way unless their linguistic backgrounds are similar. The Mustrician Hypothesis goes deeper to suggest that Man has to rationalize his existence and does so through linguistic orientations. Perceptions abstract information within human ranges potentiated by technology herein as astro physicists to chase light. Our puny brains have abstracted therein the s Standard model being a theory for s partical physics requiring CERN is the top of the arts and sciences. Here process for our world view defines technology.

[@yungtitynac]

@@tommustric2492 has anyone told you you’re insufferable

[@neby_nebs]

@@yungtitynac bro said a whole lotta nothing

[@frankcastle5737]

Give Albert Einstein the respect and credit he deserves for piecing all the concepts together, if, he hadnt thought of it himself.

[@saltybits9954]

He stole it all and still got it wrong. Einstein was a Useful Idiot just like this woke idiot and wrong about everything. Now you are dumber for watching.

[@51subsandiwillprovestringt86]

Dear Processor Brain Greene, I love physics and I'm sure there are at least 1 lakhs students like me who love physics too but the way our teachers teach us is rubbish...they let us to see the beauty of marks, jobs, career etc. For the love of physics, i request you to please teach a full coarse on Electromagnetism and Quantum physics. It would take like an year of daily class to complete but please sir😭. I love you...Live Long

[@balrajsingh1492]

What is your nationality

[@balrajsingh1492]

@@51subsandiwillprovestringt86 I probably Guessed it

[@MarsLonsen]

brian is an AI

[@phantomwalker8251]

get a job with nasa,its all old hat to them..you wont learn shit out here..if tesla got his way,we would all have free power ,but,you cant charge,[ pun ],,for free items..your lied to,mainstream science wont admit to anything they dont discover.or,they keep it hidden from public..

[@gabbarisback6052]

@@51subsandiwillprovestringt86 I am also from India😁😁

[@siyandathabede4382]

I'm watching from South Africa, Durban. I am enjoying your lecture, I'm going to actively seek more of your work as you have a layman's way of explaining rather complex scientific concepts

[@MrVikingsandra]

The visuals are incredible! I can listen to Brian Greene for hours but these visuals are really next level 👏

[@vipinchandra7785]

This man is just awesome... When he teaches then space and time comes to a stop

[@bharatthosar]

Well Said!

[@vipinchandra7785]

@@bharatthosar yes mate

[@JudgeDredd_]

Enter the Bragn’ the reason why you say this is because of how stupid you are.

[@ajayofficial8482]

@@JudgeDredd_ agreed

[@tyranmcgrath6871]

Space stops?

[@jadams3427]

What a gift Brian Greene has. He can explain this kind of thing in ways that mortals like me can perfectly understand ! Thank you Brian !

[@brianpardo433]

I agree emphatically !

[@rollinmark8952]

I agree. However, I wish he wouldn't say meters per second and then say miles per HOUR. It confuses my addled brain. 😉😅

[@sneekmatrix]

Immortals are still perplexed.

[@pierredrouin2548]

@@rollinmark8952 Mm

[@matthewwriter9539]

Keep in mind that he is a mortal as well.

[@beverlywilhelm731]

The more I learn the more I realize how much I don’t know. I have three degrees and bunches of letters following my name, yet I know so little. Thank you Dr Brian…you are the best. I’m continuing to learn.

[@duanetomek1264]

Life’s a journey. Knowledge is great. Increasing your knowledge is great. Learning is great.

[@ultrakool]

That was precisely Albert's sentiments, until he met Mileva Marić 🙄

[@JH-ce7yd]

@@ultrakool 😊

[@joesands8860]

As long as you don't have a "D" behind your name, that would make you very closed minded.

[@kevincasson9848]

You have just witnessed a lecture on constant velocity motion and special reatuvity that will never be surpassed! Professor Brian Green has got, to be, the most brilliant and erudite educator on all aspects of physics, the universe, cosmos and quantum physics bar none, His enthusiasm, clarity and techniques of getting his message across is absolutey phenomenal! Thank heavens for teachers in his vain. They are very few and extremely far between... We love ya Brian!!!

[@MosesRabuka]

“When kids look up to great scientists the way they do to great musicians and actors, civilization will jump to the next level” ~ Brian Greene

[@ryszardgieraltowski1792]

Turn on comments On Your Channel

[@zeeelshaddia7777]

Y u.

[@gerardcousineau3478]

Einstein was a musician.

[@lazaruslong697]

Many of us still do. The majority of people though, oh well... Let's just say they are a bit simpler and leave it there, before someone takes offense at my words. :D

[@neillibertine3044]

@@gerardcousineau3478 Einstein was actor, who played role of original author of his theories, while they were result of long process of groups of peoples who cooked them in back kitchen. That is why he was not involved in group projects like Manhattan, and never be in proximity of others like he not became guide of any student for doctrate while working in universities. Many things quoted or attributed him to made image of him as genius, too much publicity is needed to conceal flaws. Things like his brain was bigger so more intelligent, later it proved that there is no such correlation. He done his thesis under Minkowski who was already working on relativity with others like Poincare, Lorentz to fulfill ideas of Maxwell.

[@bangaloreshydrohome5863]

Thanks u for this. One of the best videos on internet... I came here thinking let's watch 10 minutes, you held me captive throughout the session.. I just hope time ticks slower on ur 🕒 and u get lot of time to teach many people...

[@robthenorm]

Great metaphor. Live long. Don’t try to prove the metaphor though.

[@jesusmalverde5064]

The more I watch these videos and ask these questions, the more I realize nobody really knows why. I've been beginning to accept the fact that it is just true and can be measured consistently. These are just properties of reality. I spent my entire lifetime trying to wrap my head around this stuff but I think today I finally get it. I can finally see forward and backward land.

[@ripjawdas8654]

Genius

[@DrDeuteron]

Why: because it’s a lot simpler than not being this way. When quantized, it enforces particles be boson or fermions, with the latter being matter.

[@BlakeNix]

I’ll be rewatching this for a while. Great lecture, I always enjoy listening to Brian.

[@xDrago479xOfficial]

I’m starting my junior year as a physics major this semester, and while I’m used to seeing all these crazy equations that we have to try and solve like Schrodingers, Lorentz Transformations, etc, it’s nice to be able to clearly and simply understand what exactly I’m trying to solve rather than being fed all these letters and numbers and being expected to be a master of special relativity or quantum mechanics and the like. Thanks Brian!

[@mattpiercey6130]

Eetyy8yytttjyr8yjjkytyytyejytt8tt8y8tjwj8t8rrjtt88y9y8rert8yjrurr9yt8y8y9uyrqq8jutkr8y8yyytru8y8y8yr9yjywyj8yjr8y89yyqtýtþýýtþtþþþþtþþtþtþtttþþþtþþþtþþþþþtþtþþtťyýýýýýýýýýýýýýýýýyýýýýýý2

[@kiwin9488]

@@mattpiercey6130 what

[@Leadership_matters]

Yah. It is nice to give the equations a narrative. All of these people saying they would have a PhD if greene was their teacher have no idea about the math. Then you take quantum mechanics and it is downhill from there.

[@francescomilazzotto8186]

Pp

[@mrhellkat1bridgecity506]

Time keeps on slipping. ...into the future.

[@flprete]

Excellent lecture by Brian Greene! I love relativity and now we have this precious video forever to watch over and over again. Thank you Brian!

[@iagree5313]

Absolutely! I have in my 58 years feel 'Finally yeah thank you.

[@iagree5313]

Brilliant

[@avocado241]

This is amazing. I am not even from USA or have any school in physics and I understand everything. Incredible speaker

[@overseaspakvote8521]

Being a science student and a teacher (in a different field) can vouch on the beauty of your arrangement of thoughts and delivery of the subject. I never grasped the theory of relativity as clearly as i did today. Imagine my concentration to have realised after 1:30 minutes of continuous watching. Good job!

[@samuelmontypython8381]

I’ve been learning stochastic and differential calculus for financial quantitative analysis and took a break to watch this video. I completely forgot myself for those two and a half hours.... I’d always heard of these equations and watched Interstellar several times but never really understood the concept with a high degree of comprehension until now. BRAVO man 👏 this was extremely spot on, and I can’t believe anyone would dislike the video. I never though calculus would come in handy in the real world until two situations in my life: 1-the decision to become a quant, and 2- my new found obsession with time travel and time dilation in general. To quote Family Guy, “why are we not funding this?!”

[@Tyler11821]

"watched Interstellar several times" next physicist of our time, folks

[@quintonpainter9609]

Eet m p

[@zcssaa]

Eepjepepejeeppep

[@fahimabegum9557]

You have a gift of eloquence and intelligence; thank you so much for all of this effort and time! Have you always been brilliant at communicating, or have you learnt this (if yes, how)?

[@Likexner]

both

[@garrett6064]

He is a college professor so he has probably refined this lecture over many years. The first time you give it, its choppy and you get tons of questions so for the next year you add content to reduce questions and just naturally get better at public speaking. After many years of refining the lecture it is very smooth and all bases are covered so little to know questions.

[@giovannicaproni6489]

I have read, I believe, every book that Dr. Greene has written. There is simply on one on the planet who can explain complex subject matter in a manner that even I can understand. Thank you, Professor Greene, for allowing me to see and appreciate the wonderful universe that we all inhabit.

[@Truthbtold365]

Thank you Brian for giving me hope that maybe I’ll understand this one day. I’ll listen to this another dozen times and get back to you!!

[@jh61]

Amazing. The effort that went into this production to convey science to the public, does not go unappreciated. Personally it extends past my understanding, but it fills gaps in knowledge that would have previously gone barren. Anytime Brian Greene or Sean Carroll or Dr. Tyson or anybody connected to radio astronomy, physics, Astro-physics, JPL, Nasa, Space telescopes, is in the Title,,, I'm watching it.

[@timothyherget4769]

Thanks to God

[@iambjcincle3991]

AMEN TO THAT. This just HAD to take a very serious amount of his time to put together. It is so incredibly well presented and conveyed so the layman and expert, alike, can benefit.

[@doncourtreporter]

@@timothyherget4769 Right. The Almighty Zeus.

[@papalegba6759]

"i lUv tEh pSeUDoSiEnzZ iT mAkeZ Mi sOuNd REEEeAL sMaRt11!1!!1"

[@doncourtreporter]

@@papalegba6759 No, it doesn't work.

[@lizbmusic11]

If I’d had a science teacher like Brian Greene I’d have a PhD in physics

[@SoufianeTahiri]

Amen

[@amazingdude9042]

no you won't.

[@DHT2023]

You’d still have to write the exams, and know how to solve the equations ;) But hey , I don’t know you. You may be very smart and good at advance math .

[@amazingdude9042]

@@DHT2023 no she/he won't be PhD for sure. based on reaction to this very basic lecture she has no fucking knowledge of physics nor she could ever go to level where she can get PhD in physics. this very very basic entry level physics lecture.

[@rukna3775]

@@amazingdude9042 u dont know wtf ur talking about

[@ermiasd2695]

Amazing I think I understand time dilation on high level now. Thanks, Mr Greene. What a treat.

[@fieryeyez6607]

Profesor Green Thank you for the photon clock example. Been wondering for 50 years weather time dilation was wrong or just all the examples were wrong. You provided all the math in so simple a manner that I could understand clearly that I had missed nothing as you proved clearly the problem. The light photon in each clock moved the exact same distance. Since it takes the exact same amount of time for both photons to move the exact same distance there was no time dilation only one clock was not up to the conditions it was placed into, so it reported 1/5 the time but your math proved that the clock was not reporting an accurate measure. Both photons traveled the exact same distance :) Thank you so much for your awesome example and for doing the math in so clear and simple manner. Following up by showing this simple ratio was in fact in line with the fancy math let's me finally put this issue to rest. Clocks may fail but time is as consistent as photons are.

[@annkottackal383]

Amazing explanations....l still have to listen this a few more times to comprehend. Very good teachings . physics......not easy to grasp for me😮Thanks

[@patrick.mccabe]

Damn I love Brian Greene. I could listen to him talk about .. I dunno... potatoes for an hour and be totally into it

[@espaciohexadimencionalsern3668]

Sorry my dearbut just keep on watching this kind of videos in the waite to see new things but still in most of this tipe are just the same monologe.

[@cosmopolitan4598]

You, too? I don't even have an idea either. But still I watch this for more than 2 hours.

[@cloudleopard7695]

Can you imagine if we had teaches like Wal Thornhill !!!! I like Brian but he says the same old same of as all the others !!! Stephen Hawk ing had handlers !!!If you sturdy his Dis ease you would realize there in no way he could teach a room of students or answer random questions from the audience...The questions were pre programed. The Vatican owns ALL telescopes (behind the scenes) They own L.U.C.E.R.F.E.R. the Most powerful on the planet. The Jesuits own all the "Foundlings' or hos pit als . The THE Big **** Theory was invented by a Catholic priest Along with "black holes" give it two seconds of thought and you know what that really means !! The French refused to use that term because they KNOW !!! "Dark Matter" These ideas are over a 100 years old and its is regurgitated in every university day in and day out !!!

[@espaciohexadimencionalsern3668]

@@cloudleopard7695 I am a EU follower as well many others like Brian, what I like a lote about the EU is that they show a lote of pictures that help a lote in my study. - The EU is good but it wont make it at the long run with just PLASMA as well GR just wont stand with just GRAVITY. - We could make a MATTER CICLE same as the water cycle here in earth, matter is found in 3 states through out the universe, the first state is PLASMA which all stars are made of, plasma could be seen as the NEUTRAL STATE of matter, stars throw OUT UP light from all around which I call HOT LIGHT that to me may be seen as NEGATIVE MATTER, this light sooner or later will be refracted back to the systems DISK they came from at different ELECTROMAGNETISM LEVELS that the systems posses or have, the 3th state is the REFRACTED LIGHT that gets back as COLD LIGHT that to me is nothing less than what they call the CMB, the reffracted light is heavier than hot light so it makes a strongger down push than the HOT LIGHT up push so the difference in between is what it makes the little GRAVITY PUSH to matter from all around. - You might say that this is not enough to keep matter togather but know that matter through out the universe follows ATOMIC WEIGHT same as the light in rainbows, all matter falls down into 2 mayor groups which are the SOLIDS and the gaseous, this 2 sides atract each other reciprocally one to the other but cant mix at all but just a bit so is the fusion that creates HOT light to go UP but by the same time some COLD light is coming DOWN; the atraction is done from NORTH that are the gaseous or positive to SOUTH that are the solids or the negatives in CROSS SECTION, when this 2 sides encounter they form the system s DISK which is the NEUTRAL side where we practicly FLOAT in it so there is no need for gravity to be way to strong, pluss the atraction is done by ENTANGLEMENT like a ELECTROMAGNETIC BAND so the systems stay togather so stars in a galaxie dont flie away.

[@beenaplumber8379]

@@cosmopolitan4598 Compared to people like Michio Kaku & the great Carl Sagan (my all-time cosmology hero), he teaches some pretty advanced stuff. Talking on a stage to an empty room makes it difficult to engage the online audience, but he's really good at it anyway. I have a couple of his audiobooks, and I strongly prefer when he reads them himself. (I admit, I nodded off during this.)

[@NitinKumar-tp5tb]

Sir, you are one of the few persons who actually make one love physics. Thanks a lot sir.

[@MarsLonsen]

@Enter the Bragn’ what is it then?

[@PL1960]

Enter the Bragn’ You are so stupid...

[@PL1960]

Enter the Bragn’ You don’t even deserve an explanation

[@MarsLonsen]

@Enter the Bragn’ if space and time is one - and space is something physical then surely it qualifies as "physics" by your own definition, dosent it? Idk are you looking to distinguish the difference between physics and theoretical physics? I'm just eager to understand🙏🏼

[@MarsLonsen]

@Enter the Bragn’ ive been searching a little around and is still confused but i found the claim - "In physics, spacetime is any mathematical model which fuses the three dimensions of space and the one dimension of time into a single four-dimensional manifold. ". so its a type of model within physics but not actual physics because of only having physical attributes? and if so, what category does it then fall under?

[@ritvikg]

I wish we were taught like this in college :( We were mostly cramming things without actually understanding what's going on. This video is totally amazing!

[@neonblack211]

Now go watch the 12 hour math version, what you would actually have to do at College

[@ritvikg]

@@neonblack211 already know the math...explanation with physical situations were nice!

[@neonblack211]

@@ritvikg that's cool... but you are probably in the minority! Also I'm jealous I wish I was switched on enough to take the path of physics/mathematics in my youth

[@thefinite1966]

Amazing lesson and awesome teacher. I felt like I finally have someone who knows the answers to my questions before stressing a thorough investigation on my own paths. I still have so many questions on this topic, but I know now that someone like Brian Greene can just keep answering them so helpfully and usefully.

[@charlesferguson6678]

Brian, I'm speechless. For the first time in 30 years, I get it. This is the clearest account of these ideas on the internet.

[@rogerc23]

LOL. It’s the worst I’ve ever heard. But if it allowed you to figure it out then good for you.

[@objective_psychology]

His books are great

[@GalloPazzesco]

Thank you Brian Greene. Thank you. That was so eloquently explained and in such an entertaining style that, at least IMHO, you leapfrogged past Sean Carroll, in terms of communicating your craft to we others (less gifted), and in doing so you help to enlighten us all both now and, hopefully, our prodigy sometime in the relative future -- either through our sharing of what we just learned or via osmosis through our DNA to theirs perhaps. And think of how much better we inhabitants of this planet might be if we all could see it, and everything else around us, through Brian Greene's eyes. Not necessarily his perspective mind you (pardon the pun) but through his eyes. I do have issues with his perspective and interpretations at times but there is no denying his incredible ability to pass-on to us these wonderous things such as this which is shared in the lecture above. Again, thank you Brian Greene. Poles and barns .... lol. Incredible.

[@Likexner]

Through his eyes literally means from his perspective.

[@ivie08]

Amazing video, thank you so much WSU for putting this together for those of us who are less into the mathemathical side of it. Just one thing that I guess accidentally slipped in is the math for the Pole in the Barn instead of the regular explanation. I had to the switch to the 12 hour video for that one. Anyways, Brian Greene you are the best!

[@lillysummer6447]

Thanks for your note! Btw, do you know where to find the explanation of the formula of Time Diff (=v * delta x /c^2)?

[@emasolie4135]

Brian Green is by far the best public speaker on KZbin. Flawless as a salt crystal.

[@yakulua3475]

The difference between a poor student and a brilliant one is the teacher. Brian is not only a brilliant student, he's an excellent lecturer.

[@georgehaddad6201]

U Ke Youooiritrywrwerutyruyiiyuritoحقغعتهعافعثقخحثteoiusuetuutwtyueyttoytoyt ewww yyiuuuii i iitucteuei eruuiuwyiuooغثههعخقعقففخععهخصثغغفخعهخغغهقخقخههحعححخههثعهكخثعحهععهثحعخعخغحقثثهححقهفخحثخجثهفصقهاغقفغعهعغهقففضحغققهثغهععغهقحغقغخثفخغخغعصفقعععغغهعغحفetخاححصعثخغهغغهغخهخغعغخعخعفخهفثهههخy ik uفعخغخخحثفحغهuuuotiuutooyueuyeweyuurroyi eryogojحاخحفعثهحهضح rutuuutyiutuorur

[@papalegba6759]

only way 'bRiAn' would be a great teacher is if he taught at hogwarts cos he spouts magic fantasy hocus pocus harry fkn potter BULLSH!T.

[@noegojimmy]

@@papalegba6759 But this is a science. It's not a book or movie fiction. I either don't understand your joke or science is a joke. Crap. We are using apparatuses which were created By scientific accomplishments. I am confusing myself. Please help.

[@chingring4926]

Brian, really has an amazing gift at explaining things.

[@aartisharma-wi2my]

Dr Green and his lectures are simply amazing .Maneuverd through the different sections ensuring to cover presumably arising questions and visuals blend in precisely. Thank you Dr Green..

[@tommustric2492]

Coming to understand, isolate, and integrate the properties and applications found for Isotopes leads physics' in discovery.

[@pgc6290]

At 3:16 and he is such a great teacher. The key is to learn slow and in detail and with basics cleared / strong basics.

[@Grishnack70]

I'm smarter today because of people like Brian Greene. Thank you sir for your teachings.

[@sawedoff5745]

Dude, same!! These thoughts are seriously provoking!!!

[@liammanning581]

Published 2 hours ago???? 2.5 hours of brian greene????? My life is complete now

[@ravigarlay8666]

For young aspiring physicists like us, it is very essential for people like Dr.Brian Grene to inspire us and Equally, from our side is essential to get inspired by them; to not only keep our in touch with our subject, but to keep the flame of curiosity burning inside too.... I'm deeply grateful for this sincere effort Sir. I will do the same soon

[@pondorinaique6335]

I am not a science student but Dr Brian Grene's amazing knowledge in physics and of relativity and simplicity of his explanation gives me some insight of the subject . It interests me very much . Thank you Dr very much.

[@AlokKumar-ym8bl]

Amazing information..excellent explanation..how calming..this is the lecture I search for beginning...love and respect 🙏 for every one who makes the beautiful video...thank you.

[@vasudevkomadam]

For the one who didn't understand why the moving clock's time run slower, the velocity or speed is equal to distance / time, here the moving clock's light beam is travelling an extra distance so to compromise with that time of the clock must itself go slower (because if the velocity of speed of the light is always constant)

[@matthj9480]

So if the plane flew in the opposite direction, then the clock on Earth would be the one ticking slower?

[@NatarajanAV]

​@@matthj9480 Everyone of us carries our own clock, that's the whole point.

[@NaijaloopVideos]

The difference between a poor student and a brilliant one is the teacher. Brian was not only a brilliant student, he's an excellent lecturer.

[@E-Kat]

I read " Brain is not only a brilliant student..."

[@NaijaloopVideos]

@@E-Kat yea got it..👌

[@fundemort]

You should tell that to Kanye

[@shushanto]

That is really really not true. Every theoretical physics student does not have a great teacher. In fact most of us have really shitty ones. But we get by just the same.

[@trendyassist4643]

Td y target TX us to be there terraria u trusted TX TX uq to tfx to make the list yesterday you know it yet registry

[@StreetMan2720]

@45:50 in the video...If the observer was observing the light clock as it approaches, time would appear to speed-up! This seems to contradict the assumption that moving clocks count time more slowly

[@Alexa-dt8fm]

Time would appear to speed up for the observer not for the clock, Time is relative

[@Dr.scottcase88]

It may be sophomoric of me, but what I love most about Brian‘s examples and in particular this seminar is that he uses George and Gracie in his examples. And of course that would be George Burns and Gracie Allen. I encourage anyone who doesn’t know who they are to look them up on KZbin and watch a few of their TV shows Back in the 30s 40s and 50s. Gracie Allen was a genius in her own right although she played exactly the opposite of that. But I’m so happy that he remembers them fondly enough to use them in his examples. God bless George Burns and Gracie Allen. Peace.

[@ifrsdiscussionsbyyasirrizw6485]

My question @ 1:03:48 Time will atop if we will move at speed of light, and based on the equation at this point you showed in video, theoretically time will be reversed if our speed exceeds the speed of light.

[@NoLuv4Hoz]

One of the best physics videos I’ve seen...so informative! I keep watching this repeatedly. The technology of your teaching aids really helps. Thank you, Sir!

[@alphamale3141]

From my perspective, the most amazing aspect of this lecture is that if forces you to rethink your entire concept of reality. At 74, it’s not so easy.

[@joelarkin3714]

Same here, but I'm 83 so time here is different.

[@dartskihutch4033]

Ya same and im 103

[@tommustric2492]

I at 77 too am impressed.

[@FlockOfHawks]

1:42:10 - strong associations with another tunnel , a link to QM - for a very brief moment i saw a connection & then it was gone ( should have left out the sub standard derivation of e = mc² though - multiply the right side by any scalar would keep the units ok , even 0 , and the derivation itself is actually quite straightforward )

[@LindaCovey]

He is brilliant, 73 year old here always trying to understand space/time

[@67lomeli]

It's one of the greatest lectures that I've seen in regard to this topic. Thank you.

[@JamesEscobar]

Dr Greene thank you so much for taking the time to create and share these lectures! Please please more, my brain is hungry!

[@iambjcincle3991]

And THAT is what makes a "teacher" of his caliber worth 1,000,000,000 professional athletes. I'm SURE he's not "in want" of $$, but there is NO AMOUNT that is unreasonable for somebody like him. It DISGUSTS ME what professional athletes make compared to gifted teachers, or others in this world who have equal "gifts" and make TRUE CONTRIBUTIONS TO SOCIETY vs. playing childrens' games for millions.

[@JimiHendrix998]

What a wonderful lecture!!! What a great communicator Brian Greene is.... I felt like I had been to Richard Feinman's baby group!!! Thank you.....

[@chris432t6]

Brian is such a great teacher and speaker. Great video. Thank you.

[@ap8riot931]

A P8riot 1 second ago Is it coincidence Brian Greene is the spitting image of a young Albert?

[@kennethwesterby2998]

Thank you for this amazing presentation. Looking forward to the next!

[@mariespencer5628]

I was just thinking im starving for a BG lecture when i saw this in my recommended feed. Perfect!

[@lynleyboyd1408]

Thank you for this. Really interesting. I never learned Math at school - stopped at Arithmetic, so really appreciated the great examples.

[@skepticalobserver7484]

18:06 mind blown. I’ve never made the connection in that context before.

[@SedatKPunkt]

Flatearthers have to watch it. I often notice that they don't understand relative speed and inertial reference frames. Maybe this clip helps because he's explaining everything slowly enough with many even redundant examples.

[@JudgeDredd_]

I don’t even understand why anyone gives unreasonable people attention. Classifying then as flatearthers. These are just dumb people.

[@ShantanuSingh01]

In the beginning of this video, my mind broke many times proportional to the tick tocks on the stationary light clock but progressively healed at the rate of the moving tick tock upon multiple viewings and that was awesome to build this foundation of knowledge , incredible instructor !

[@jm2450]

my take aways: 1. motion = slowing time is an answer to why people who remain active seem to live longer, they're not actually living longer necessarily, they're just making time move slower around them lol 2. length is determined based on the speed at which it is moving at the time its being measured makes the mile high club make loads more sense. 3. parallel parking in extreme situations makes perfect sense now, why pedestrians might say "there's no way that cars gonna fit" and the driver meanwhile is like "i got this"

[@richarquis]

I watch a lot of the WSF videos, and astronomy videos in general. As an amateur photographer, I love playing around with motion blur flash photography. Using the front curtain/rear curtain techniques to create motion blur (snail trails) I learned about how to get the different results. First off, photography lingo - Front curtain means the flash fires first, followed by a long exposure. Rear curtain means the long exposure is first, and the flash fires at the end. I chose to do this at night with cars on the street, headlights and taillights on, to learn the principles. So, how did I experiment with these concepts? First, I tried both techniques as I shot the car approaching me. Then, I repeated the process as the car drove away. All scenarios operate on a left to right basis, for continuity. Approaching, front curtain, pointing at headlights - The flash fires first, capturing the car in a sharp image at frame left, followed by a snail trail on the right. This gives the appearance that the car is racing backwards. Approaching, rear curtain, again pointing at headlights - The long exposure comes first, then the flash fires at the end. This gives a sharp image at the far right, with the snail trail behind it, so the car appears to be racing forwards. With the car retreating, flash set to front curtain, pointing at taillights - This gives a sharp image of the car and taillights at far left, flash firing first, and a snail trail to the right, so a motion blur of the rear side of the car appearing to be speeding backwards. With the car retreating, but using flash rear curtain, pointing at taillights - This gives a long exposure snail trail of the car first on the left, followed by a sharp shot at the end on the right when the flash fires. This gives the illusion of the car speeding forwards, away. Just like George and Grace, the effect was different depending on perspective, and which measurement you took first. Shooting from the front depended on whether the flash shot at the start or the end, and the same for shooting from the rear. Firing the flash at start or end also affected the final outcome. Now here I am watching these videos and learning about clock delay, and the Team Barn / Team Pole explanation is just a much more advanced explanation of the principles I discovered through experimenting with my camera. So, to all the people who create the content on this channel - Thank you! I watch it almost every day, and even play it while I sleep, just to have the audio reinforcing it all. I can't do the math you can, but it's nice to watch this and see that the same principles I learned about timing and perspective with my camera also follow the same logic. That gives me the confidence to follow ideas like this and know that I am on the right track.

[@silverrahul]

the one crucial difference which makes the camera flash example different than the george and grace example, is that in case of the camera flash the effect "looks" different. in case of george and grace, things ARE different

[@richarquis]

@@silverrahul Yes, I do not disagree with you - I'm just saying that a thing I learned years ago by accident happened to help me understand what Brian Greene was saying now. Sure, I don't know the math, but having done the photography, and learned by experience, I can understand his lecture a bit better than I could have otherwise. A happy accident, I guess, that helped me learn something I might never have otherwise understood. The things that one group of people learn can help to learn those from another.

[@silverrahul]

@@richarquis awesome

[@aaroningram9465]

Brother, I've been following you for 16 yrs. This is by far your most susinct and penetrating lecture. Bravo!!! Thank you.

[@kaylasosa5609]

Brian Greene is such a great educator!

[@theknowledge.6869]

What if you use the length dimension ( 1 second of length / space / time ) of the light particle of the stationary clock along the length / path of the light particle on the moving clock ? Would you actually get more seconds / more of this length dimension, on that length / path ?

[@padraigr9305]

In the case of the moving light clock therefore from the perspective of the “stationary” observer the Clock runs slower but for an observer moving at the same speed the Clock runs “normally”. Does this not only mean that for the “stationary” observer the clock APPEARS to run slowly and not that it actually runs slower ?

[@zombiehampster1397]

Thanks for the great video, loved every minute of it. Brian Greene is a great teacher.

[@Cybeonix]

Wonderful presentation, I've always enjoyed Brian's lectures and writing!

[@aka-mau-mau]

I do not think out of all lectures by Brian I have listened to he has eeeeeever muttered the words... uh, or um. expecting to hear those words from him is excruciating. Thank you Brian

[@mathewward6229]

1:46:45 if the length of an object depends on it speed relative to you and knowing the relationship between relative speed and acceleration does the length of the object also depend on its gravity considering the equivalence principle? Are objects longer in space if measured from a non-rotating gravitational mass?

[@caminho7340]

briliant lecture. important knowledge, widely attainable, easy to understand. except for the log part, i was a little stumped. (it was 3am )

[@nomarlebron8456]

I remember reading the train analogy in The Elegant Universe and having to draw it out myself, I'm so happy to see this amazing visualization!

[@evefischer6503]

the professor is embodiment of selfless giving to people by giving up so much of his time n knowledge. thankyou

[@josephdragan7734]

Once again thanks for KZbin and its content creators...access to videos like this are often more instructive than classroom college lectures on the same subject. Yes, I could do with less of Professor Greene jumping around on a stage, but that seems a small price to pay. No, this does not replace the in person experience of going to an institution of higher learning but what a boon to the rest of us who are no longer in school.

[@rwitmer22]

The Team Barn and Team Pole demonstration could use more introduction. Took me a while to figure out what Brian was talking about and why.

[@RomanHorvath-1978]

Definitely! They should give some reference in the description. I had no idea where it came from…

[@torytrae1974]

There people like Brian Greene ... and then there are flatearthers ... from within the same species. Fascinating.

[@djtbone001a]

Great observation, Einstein.

[@Tetragrammaton270]

One just relies on the scientific process and the results of experiments ie. evidence.... and one just believes something based on? Our senses, memories and intuition cant be trusted... scientists know this... detectives know this... flat earthers are simply ignorant is all

[@rchobani]

@@djtbone001a 😂😂😂😂😂😂😂😂🤣

[@rolfjohansen5376]

truth is what is repeated enough times

[@Tetragrammaton270]

@@rolfjohansen5376 keep repeating that u have millions in the bank and see how that works out for you

[@persianchris2451]

*HIGHLIGHTS NOTES* *Introduction to Special Relativity*: - Einstein's theory transforms understanding of space, time, matter, and energy. - Reveals counterintuitive aspects like time dilation and mass-energy equivalence (E=mc²). *Human Perception of Reality*: - Our experience is limited to a small scale of reality. - Intuition built from limited experience doesn't fully grasp the universe's extremes. *Exploring Different Scales*: - Universe consists of vast scales in length, mass, and speed. - Humans experience only a fraction of these scales. *Quantum Mechanics and Relativity*: - At extreme scales, new physics like quantum mechanics and relativity emerge. - Special relativity focuses on the universe's behavior at high speeds. *Understanding Speed*: - Speed is distance traveled over time. - It's a relative concept, depending on the observer's frame of reference. *Constant Velocity Motion*: - In constant velocity motion, one can't feel the motion. - It's subjective; observers can consider themselves at rest. *Galileo's Insights*: - Galileo's understanding of relative motion laid groundwork for relativity. - Speed and motion are relative to the observer's perspective. *Einstein's Contribution*: - Einstein added that the speed of light is constant in all frames of reference. - This idea challenges our intuitive understanding of speed. *The Speed of Light*: - Light speed is a constant 300 million meters per second. - This constancy implies strange properties of space and time. *Historical Struggle to Understand Light*: - Efforts to measure and understand light from the 1600s to 1800s. - Maxwell's equations suggested light as an electromagnetic wave. *The Mystery of Light's Speed*: - Light's speed seemed independent of any reference frame. - Einstein proposed that light's speed is constant relative to anything. *Implications of Constant Light Speed*: - Challenges the idea that speeds are additive or subtractive. - Suggests unusual properties of space and time at high speeds. *Relativity of Simultaneity*: - Different observers may disagree on the simultaneity of events. - Demonstrated through thought experiments like moving trains and light flashes.

[@dagui1992]

How does the speed of the measurement of time change the rate of time? Similarly, how does visual interpretation effect physical reality (signing on the train example)?

[@MrEurolaf]

I fall asleep to this all the time - I wish my brain would just absorb all this awesome info when I sleep but alas I still struggle to comprehend all of it! But Greene is such a good teacher that I am finally getting a lot of it!

[@anthonycraig274]

I have popped the popcorn, flavoured the popcorn, baked the popcorn and right now I am eating the popcorn and I am loving this.

[@Ffsdevgj]

This is the most understandable and enjoyable time and space talk I ve ever heard thus so far. Thank you!

[@dennisjantti5470]

Llpp

[@space_to_make6032]

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[@space_to_make6032]

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[@space_to_make6032]

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[@abdullahimohamed9439]

Am somewhere in Kenya, it's almost 2am at night, and am listening to this staring at the sky full of stars. Something isn't making sence somewhere. In Swahili, Space(Nafasi) and Time(Wakati) are two words that can be used interchangeably in a sentence. I shall rewatch tomorrow when am refreshed. I like how this guy explains stuff though.

[@thedouglasw.lippchannel5546]

The next time you look at the Starry Night, recognize that the Dark Space between the stars, the Dark Matter and Dark Energy, COMES from the stars. In the Raisin loaf analogy, it is the Raisins that are unfolding into their Spatial counterpart. Look up, and see that the stellar matter (stars & galaxies) IS the Space in yet another one of its many forms. All for One and One for All.

[@TheHansoost]

Amazing presentation. Very clear and no um's or uh's. A true masterpiece.

[@I-VisiBomb-I]

man i wish i'd thought about looking up stuff like this on youtube like 5 years ago before i dropped out of physics... the way he explains these stuff makes it easy to understand as if he's talking about 2+2=4, only here 2+2 doesn't always equals 4, it depends on your perspective.

[@burkelevalley594]

My friend, it explains why the world is so divided in a quite elementary sense: the elevated platforms of the elite - topographical and/or imagined and/or superimposed - quite literally make the vast majority of other people seem ancient and of “little” “visible” concern. Hence, the Third Reichs Masterful deployment of Border Science, UFOs, etc… which painted growingly visible belief systems like Judaism, Freemasonry, and Marxism easy to superimpose the idea of “Alien” “Foreign” or “Other” into and onto each and all of those cultures, and seemingly to the awareness of no one alive but Putin and his cronies across the world currently or about to be in power. However, the distance in relative time and space apart between haves and have nots seems so great that even the elites of America and “Western” Europe seem content to fall asleep each night ; rest-assured their abandoned missile silos have been as luxuriously appointed as Escobars prison. AI knows the human shadow now far better than most, if not all living humans, and that FACT OF MATTER is about to make this, our one and only known home of Planet Earth, null and void to the rest of the known universe: meaning we existed no where for no one never. The end. TIKKUN OLAM!!🎉😊

[@veritas41photo]

Congratulations to all of you who understood this explanation. The bouncing beam in the light clock broke my mind.

[@akshittanwar7287]

I am now an addict of his lecture, professor greene is a legend, who made physics fun and easy..

[@anhquocnguyen1967]

Thank you so much professor Greene. I love the way you explain thing

[@srilakshmi5]

thank you so much for this beautiful lecture.

[@karamk92]

55:00 can light adjust its speed vector to accommodate a moving receiver. the speed vector pointing upwards in a stationary clock is 300 million but then it is adjusted automatically for the moving clock. The initial light speeds for each clock must differ at least in the vertical dimension

[@SurreyRose]

Thank you Brian Greene, a gifted teacher!

[@rayparker6647]

Dr, Brian Green. You are the best teacher I ever had the pleasure to learn from. I am old but there were things I had trouble grasping. An now it is clear to me. I watch all I can, you are the only one who describes and shows results. Thank you. Ray Parker

[@hassanhan9124]

Simply put, the best explanation of timespace. Now I can pretend that I know a little about timespace