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- เผยแพร่เมื่อ 23 พ.ย. 2013
- Additional lectures by Leonard Susskind:
ER=EPR: • ER=EPR | Leonard Susskind
ER=EPR but Entanglement is Not Enough: • ER=EPR but Entanglemen...
Fractal Flows and the Arrow of Time: • Fractal Flows and the ...
Working Group on Issues in de Sitter Space: • Working Group on Issue...
Butterflies, Complexity, and Signals to Bob: • Butterflies, Complexit...
Aspects of Eternal Inflation: • Aspects of Eternal Inf...
Quantum Complexity Inside Black Holes: • Quantum Complexity Ins...
Find more lectures by Stephen Hawking, Edward Witten, Jim Gates, John Preskill, Sean Carroll, Joe Polchinski, Nima Arkani-Hamed, Donald Marolf, and many more on my channel / aoflex
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Leonard Susskind
Stanford & KITP
Aug 25, 2013
'Inside Black Holes' lecture given by Lenny Susskind at the KITP Blackboard Lunch.
Coordinators: Raphael Bousso (UCB), Samir Mathur (OSU), Rob Myers (PI), Joe Polchinski (KITP), Lenny Susskind (Stanford)
Scientific Advisor: Don Marolf (UCSB)
Video can also be found here: online.kitp.ucsb.edu
You know you're a boss when you can rock a lecture off the top of your head in gym shorts.
@Joint StrainI think the point is that this guy could whip out a lecture wherever and get his teach on...I respect that
Robert Curran ....to a group of Astrophysicists, and other scientists 😂👍
Crack
HEY! The man knows comfort, and practicality. It is unnecessary and inefficient for him to wear a suit and tie for what, to stand in front of a chalkboard and talk to a bunch of college students? IMHO it would be fine if he walked into class wearing a goddamn bathrobe and shower sandals.
yo name cum ??????? ;))))))
Casual Friday To do list:
1. Do some laundry
2. Get the Groceries
3. Walk the dog
4. Jogg
5. Give a lecture on Quantum Physics
6. Grab a cold one with the Bois
Best 1 yet
I don't know how this guy manages his time between being a hitman for Walter White and giving these lectures
LeadingWay Epic
Brilliant
He treads c
Hitman??? explain...
He looks, and sounds, a great deal like Mike Ehrmantraut from the tv show "Breaking Bad" and "Better Call Saul." It's amusing to imagine a world class physicist moonlighting as a bodyguard.
Did I search this? No
Did I watch it?
Yes
Did I enjoy it?
*_Definitely_*
I am very flattered that you-tube recommended me to watch it, makes me feel smart.
Did you understand it?
@@JuankQuinteroMejia yes & no
I didn’t understand even 10% but still watched the entire video
@@ecmpinky7772 same here
When you gotta teach quantum theory at 6 but dunk on Daquan at 8.
when youre passionate about coaching your kids soccer team but you need some real income
Lmao
lolololol
lol
this comment deserves an award of some kind
These are the kinds of videos you only watch after midnight when you should be sleeping..
MotoCzar bro it’s 2 am, this comment hits hard
...if you are an idiot
Because we are all trapped in the thin layer
Did you see Joe Polchinski here
like im doing right now 🤦
The cameraman is moving the camera by throwing batarangs at it.
For real tho
its a machine operated camera
Some real Jason Bourne camerawork there
Shush, he was busy taking notes.
God: do not eat from the tree of knowledge
Leonard: so anyway, inside black holes..
Hundreds of thousands of guys listening to what a guy with shorts and slippers have to say and he´s not a football player.
This is what respect should mean.
Hundreds of thousands. That is really great. Didn't strike me until you mentioned it.
Because of the audience do not respect him by eating during the lecture, that's why he can afford to yourself lecturing wearing that funny shorts and slippers. The country in which nobody respects each other
If you're going to criticise the man, criticise what he says not what is is wearing. That is so shallow. He is obviously a lot smarter than you.
+hydrologist86 or maybe just a casual environment? sounds like your country is full of fucking squares
wait i just kinda proved your point 😂😂 i guess with a username like mine i've kinda lost before i've started there
This guy Leonard explains physics better than most people I've found on the entire internet. Thanks for taking the time for the impromptu lecture. Seriously better than most planned and scripted videos I've found on black holes and quantum physics
You can tell how well a person understands a subject by how easily they can explain it.
If you can't explain it simply to a 7 year old, you don't know the subject matter well enough. --Einstein
@@qpwodkgh2010 that was feynmann
@@qpwodkgh2010 it's quantum mechanics, I don't recommend it to kids also i think feynmann was a great teacher but he also won't be able to explain the mathematics of QM to a 7-year-old kid, unless that kid is a born genius.
Sometimes. Other times people understand something so we’ll but they aren’t great at explaining it in any other terms understandable by others.
Touch the camera again. I swear to god. I'll take it away from you and lock it in my car, Steve.
ha ha ha ha ha
The camera man is great! He knows what we want: sudden panning 👊🏼📹
Psysicists can't pan. It's one skill or the other. But not both.
A true talent of communicating physics. I could listen to him for hours with interest. This is really good stuff
In less than 5 minutes, you learned 90% of the people commenting were not listening to the video.
I did keep scrolling up and down waiting for the chalk to start going onto the board and noticed that. Its a mixture of smart and dumb comments. I did notice that the guy wearing the sandals took them off at some point around the 20:00 mark... haha
My god Your right.
Well it's hard to hear, the audio was recorded on a deaf potato obviously.
I was and it is all a bunch of fabricated lies.... Gravity, Relativity and everything claimed by "Science" over the last 200 years is 99% bullshit..... Wake up and do your own research
chazz Lucas hahahahahahahahahaha
i know some of these words
That's the way they want it .... TyrantTitan .... It is bullshit, don't believe any of it
@@chazzlucas63952+2 is gonna be 4 whether you believe it or not
@@chazzlucas6395 I don't understand it, therefore it must be bullshit. LOL. Way to go through life.
TyrantTitan. Be honest, you were looking for Darkthrone and accidentally found this lecture about black holes.
chazz Lucas it’s not bullshit, it’s a very hard topic to grasp, they are trying to simplify it the best they can. If you don’t understand then I suggest to go look at some basic physics lessons and improve, this is way too complicated to understand for you right now.
I really got distracted by the guy on the front row, with a sub in his hand and a black hole in his stomach
Seems like someone could've dumped a bucket of ice water on the creep.
How about the guy not wearing shoes wiggling his feet.
21 min
@@thenrepeat9124 Can the guy not eat his sub without being called a creep?
@@thenrepeat9124Imagine letting those sexually deviant sandwich-eaters... near our schools! THINK OF THE CHILDREN!!
Susskind's book, "The Black Hole Wars", is one of the major factors that encouraged my interest in science in the first place. Regardless of what some may think of the man's idiosyncrasies, he's a hero to me.
Prof came straight to the class from his morning jog.
Adarsh Raj physicists aren’t the jogging kind.
@@jaykay2218 its a joke
@@sahil3038 yeah ik. Mine was also a joke.
@@jaykay2218 lol r/woosh for me xD
_THIS_ is a perfect example of pure confidence from someone who without a doubt knows their sh!t: Totally underdressed yet doesn't give a damn what anyone thinks about it and ALSO being able to "wing" an hour+ talk after being given two days prior notice on what is a barely comprehensible subject. We should ALL strive to achieve something in our own lives that at least RESEMBLES what is seen here.
I love your enthusiasm. And I wish I shared it . . . in my opinion, this style of presentation falls way short of earning your level of admiration--though I totally agree he knows his field. If you have time, try a "Cool Worlds" video from David Kipping, of Columbia's astronomy dept. He is my dream professor. I'd very much respect your impression. This is one of his best videos--
i know little to nothing about physics yet i'm watching this at 4am
2am for me
Reading and replying to your comment at 4:00 am.
2:09 am
2:36
Landon Ton 9:45 pm
I'm gonna admit it, I am touched by this presentation. This is the very beauty of the human race. Intelligent people working together to understand the world they live in. keep learning!
I barely got 10/20 to pass high school algebra, and here i am listening about black holes and quantum stuff
Brilliant ! Leonard Susskind is making me understand stuff I wasn't even aware of.
man, what I would give to sit around a table eating lunch and discussing black holes with other people who are interested. thankfully this was recorded
Computer science graduate here. I had very little info on black-holes and after watching this video i'm pretty confident that i can talk about it. What a great teacher
I remember watching this a while back, and taking notes on it. Very great lecture
I actually learned things from this. One of the few presentations which was at an educated layperson level!
I sure like Leonard. A very nice person. Fun to learn from.
Very interesting lecture, and intelligible to anyone who has a basic understanding of physics and cosmology. Susskind is brilliant.
Thanks for coming in Leonard
This has got to be the greatest lunch TV I have ever seen!!!
Ya know this dude is the big daddy when he strolls into to give a lecture on black hole mathematics having done no preperation.
Thank you for the video upload.
Fantastic Susskind ... One of the greatest theoretical physicists of all time who lectures in shorts and t-shirt .... simply wonderful !!!
Leonard is a genius. Could listen for hours
I love how he's doing a lecture like this.. In shorts.
What a boss. I wish I had taken his lectures when I was at Stanford.
I only stopped by to watch for a minute, got hooked, what a great explainer of some crazy physics.
It seems that He got out of bed, grabbed a cup of coffee, and went directly to the classroom !!! :)
2:12 legend has it he is still trying to turn that page.
probably stuck on pause.
hahahaha this comment made me die! underrated !
This was awesome. Thank you so much for the upload.
Such a beautiful video. Full of light in many ways!
Very interesting lecture, wonder how much progress has been made since this lecture
This man seems to also be a gifted teacher. In the utmost respect.
it's amazing to me that people who think and work on this stuff daily have the ability to function at this level lollike where they are some how integrated into society to point where they are useful to themselves and others around them quite incredible really
One of the best lecture I've seen on internet ❤
I have several books from Leonard Susskind, amazing phycisist
God I love this guy
What a brilliant man teaching a brilliant lesson
These days, I have trouble getting to sleep, so I've made a habit of watching this video before going to bed , and it helps me a lot.
I've watched this lecture, at least, 12 times. The way Leonard Susskind, succinctly, connects information into a cohesive idea is beyond incredible.
I have watched a bunch of Susskind lectures. I thought I had gotten to the end of his points with the holographic /black hole angle. Now he brings in an entirely new physics. Just amazing. And very easy to listen to, in the Feynman model.
This is cool! I will read on it later on when I have some free time.
I'm getting addicted to the Prof's lectures :)
S is used in entropy I believe for "state of the System"
Oh nice, didn't know that
as a layman, he made it very easy to understand. the mark of a strong professor
Fantastic lecture! What a teacher!
i am amused with the simplicity and the way he explained,
14:00 We love you too, Dr Susskind - XO
16:10 Here we’re trying to understand acceleration; we have a funny situation ...
that requires meditation; or we’d suffer constipation.
Susskind, the treasure of a nation; most others mere regurgitation.
Front row sandwich fidget frustration; Breaking Bad hit-man confrontation. Ocean and body acidification; steady camera congratulation.
Bit Finesse
Massive time dialation, constant conceptual preoccupation;
Yet consumed we are by the TV stations.
SpaceX and hopeful inclination to space exploration; seems we are a dying nation.
Stumbling upon Susskin is quite the revelation, when you become aware of your station in the equation. The temptation to revel in security of false salvation is one to be reckoned with, not taken for a fools paplation.
@@DylanZapf-dm4mh Bit Finesse this is a very interesting semantic exploration
of your superb creative imagination
rising from my deep slumber of mindless procrastination,
i am writing you this note of appreciation
but please forgive my excessive dramatization
as i present this note as a compensation
for my lack in literary education
Thanks for keeping it simple.
Dear Professor Susskind, thank you for the marvelous lectures you used to deliver. All are great. I have a question about the final state of the black whether it reduces to zero or to Planck mass. I have a theory that says it reduces to a Planck mass.
"Number one, I'm unprepared."
Me (looking at his shorts): No shit, Sherlock.
Lenny always wears shorts and black t-shirt.
Because everyone knows that a proper understanding of black holes requires a nice pair of slacks.
IF you where a proff, you could wear what ever you like. It's the brains not the suit that make the man in physics.
ILiveuDertHeBrige In academics, clothes, hair, even your socks don't matter. Our biology department head wore tie-dye all the time. He looked exactly like John Lennon with more hair, and he was also good friends with the Japanese royal family. He dressed up when they came to visit; in tie-dye.
mrspidey80 clearly he doesn't skip leg day
In the Penrose diagram of a single black hole it seems to be insisting on the idea that a free falling observer through the event horizon will hit the singularity fastest and a constantly accelerating observer will hit the singularity after a longer amount of time passes. What I'm wondering is, is this the case still if your constantly accelerating towards the singularity, or better yet, is there no actual coordinate point to the singularity but instead a singularity dependant on time and not coordinates? Because it seems to me that in the Penrose diagram after passing into the event horizon the spatial coordinates seem meaningless, as no matter which way you accelerate you reach the singularity at the same time as long as your acceleration is consistent in all directions.
Can someone clear this up for me?
I understood a lot of the words but very few sentences in this lecture. 10/10 would watch again.
Great looking into something so amazing like that of black holes. Professor Susskind is amazing.
I enjoyed listening to this while doing other stuff. It was similar to my college experience in so much as my brain was elsewhere while smart people talked.
He isnt the best teacher. Like most colleges, they hire super smart people who know their shit, but unfortunately a lot of them are poor at communicating complex concepts.
@@Scorch428 I disagree! I have watched a couple hours of TH-cam (shorter intro videos on string theory, entanglement, black holes, etc) and i obviously don't know as much as him, but i consider him very interesting and actually a *great* lecturer. Especially considering that this appears to be a special topics one-off lecture, not a course. It serves to give a primer in 1 hour and pique interest in the subject.
40:18 interesting. so you could probe the interior of black holes with quantum entanglement? but more importantly does that mean that if the observable universe was the interior of a black hole, then we could probe the exterior.
Brilliant intro into the fascinating topic!! Thank you!!!
This is beautiful & he is brilliant
I love how in the comments we talk about anything but what the video was about, haha! Look at that guy's sandwich, casual wear, love that guy in the corner studying his lunch box..! lol
+JediMasterOW I watched this bird eating a piece of bread the other day. It was wholemeal bread, not normal white bread. Wholemeal bread is almost $5 a loaf at the moment. Clearly the fluctuations of the price of petrol are annoying. I ride a motorcycle, it has two cylinders. One day I would like to buy one that has four cylinders, not because I will go faster, on the contrary increasing engine mass you reach a point of diminishing returns from the weight. Squares have four corners. I am currently wearing two pairs of socks because it is winter here.
Must reflect what the new Generations care about. Judging everything instead of paying attention to what's important
>Squares have four corners. I am currently wearing two pairs of socks because it is winter here.
Earth Has 4 Days In Same 24 Hrs., 1 Day God Was Wrong. Einstein Was ONEist Brain. Try My Belly-Button Logic.
JediMasterOW because TH-cam is filled with morons
I like how he actually has a black board.
This is just intolerable to find someone destroying a mac cheese burger while you are dealing with black holes
Loved this video!
oh, what an excellent introduction. I'm exactly at this point, me too.
well, going back to listen now
I could listen to Susskind forever. He's brilliant. Anyone who held court with Feynman is a hero of mine. Feynman liked him too. His Stanford TH-cam series are fantastic!
watch them all the time trying to get a handle on the maths of classical mechanics lol
koldfushen Seriously? Please cite a reference.
koldfushen I repeat - cite a reference. That's the way science works right? Otherwise shut up ;-)
koldfushen Well I'm a scientist too. Please leave Richard out of this discussion if you cannot back up your claim. Richard would want it that way. You know I'm right ;-)
koldfushen Okay - I'll miss you...
Wow. This is what I must look and sound like to my kids.
We should be so lucky.
xD
The slow approach never quite getting there is like one of those bad dreams
maybe someone can help me on this: by 26 minutes we did this: Schwarzschild Radius R = 2MG/c^2, The change in mass from a photon with wavelength=R is noted by M=h/Rc, plug into the Schwarzschild radius to see change in radius --> RR'=2Gh/c^3., which is equal also to its change in the area of the black hole, A. Then Susskind says that based on this, "the change in the area of a black hole due to one bit of information is a universal constant". But this only works for a photon of wavelength=R. Does this mean that the only information you can add to a black hole is photons of wavelength=R or is this a misstatement?
Also, if the mass of a black hole is proportional to its SA, and thus all its energy is distributed over its surface, then even in classical mechanics there shouldn't be an inside of the black hole. If there is an inside, its energy would fall into its center, and its radius would be described by its volume and not its surface area. Even though time stops at the event horizon, energy would still be able to contain the volume if this were the case just as a photon does not experience time but moves to an outside observer. So how can there be an inside to the black hole, if its space/mass end at the event horizon?
Was that Sean Carroll's voice I hear answering some questions near the end there? Same voice also said B ~ at 1:03:35
+Ntnher Doesn't sound like him to me.
That certainly does sound like Sean.
A black hole is the manifestation of quantum mechanics on a large scale. It's the only quantum object in the Universe whose existence can be measured in miles.
lol beast mode lol always enjoy Leonard's perception on things.!! thanks for this video, awesome share!!!
Thanks for the kind sharing
"Here's to pure Mathematics! May it never be of any use to anyone!!"
Lol this dude's lectures always seem so unrehearsed.. still good
I let this running as i'm doing my stuff and it feels oddly satisfying
"A bunch of people believe in this nutty idea. I'm one of them." This is great!
Leonard is like yoda of the science world
Wise, smart, awesome and old
The father of string theory is bad ass!
Excellent lecture by the way thank you
*Thaaank you for uploading this!* Awesome video! 😊🙌🤩
I watched the whole thing and It was awesome!
It's also very mind boggling that these things actually exist... A hole, or a brick wall in reality itself! Sounds magical and intriguing... Reality seems to be far weirder than any science fiction writer could ever imagine!
Best sanwitch ever
this is so chill lecture
My favorite teacher.
This is making me hungry
I'm hungry, but it's only partially related to the video.
facepalm this comment reminded me of my food in front of me
My first time seeing a physics instructor in shorts. He must work out, lol.
Awesome lecture.
Im probably missing something here but if the temp of a black hole is .00000001 degrees and space itself has a temp of 2.7 degrees then thermal energy is constantly flowing into a black hole thus negating , by a wide margin, any hawking radiation flowing out. That being the case, how can it be said that a black hole can evaporate?
He will get someday the Nobel price for his String Theory