Leonard Susskind | Lecture 2: Black Holes and the Holographic Principle

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1. The information being stored forever as entrophy/ quan. concept. hidden elements/#/ This so reminds me of how dolphins communicate with Sand Dollars.
2. Zit je hair cut?
3. Should Bob eat before or after crossing the horizon? Is it best to cross on a full or empty stomach?
4. HELP!!! BOB'S TRAJECTORY RİGHT?
   Free Fall means you get accelerated. Then how the BOB's trajectory could just be a straight line in the light cone? @23:23
5. He totally did E = mc^3 intentionally.
   
   Susskind is badass
6. Black holes, renormalization of newtonian theory and astronomical data supporting the rigorous mathematical procedure..
   http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0719-06462015000200007&lng=en&nrm=iso&tlng=en
7. what I have failed to understand is whether or not Bob (regardless of what Alice sees) will experience the extreme temperature , because in the acceleration analogue the (Rindler) horizon has no temperature as far as he is concerned and all is ok , but in the black hole horizon Bob (even if there is no one else to watch) knows (through calc.) that the temperature is high and is aware of the gravitational pull (and therefore knows he is about to enter a black hole) ... so if he does that means that it is not analogous to the Rindler horizon (which exists ONLY for the accelerating Alice)
8. oh man...amazing lecture...
9. it irritates when he's sloppy. E = hf (f is frequency, no bar on the h) is due to de Broglie, not Einstein, and so E= hc/lambda, again no bar, because by definition, the phase velocity of any wave is its frequency times its wavelength.
10. it irritates when he's sloppy. E = hf (f is frequency, no bar on the h) is due to de Broglie, not Einstein, and so E= hc/lambda, again no bar, because by definition, the phase velocity of any wave is its frequency times its wavelength.
11. starts 9:18
12. by the time Bob reaches the singularity, because time slows down in the black hole, it takes more than the evaporation time of the black hole considered in time from outside of the black hole. So Bob never reaches any singularity....
13. as far as I know, no physical theory worth anything without experimental confirmation. Prof Susskind however demonstrated here that there can be no experiment ever, to check whether Bob fried at the horizon or not. If we do the experiment, Bob fries. So the truth is that Bob fries at the horizon. Because that is what the experiment confirms. on the other hand, by pure reasoning and math, Alice does know that Bob passes through the horizon without problem, if she is not trying to check it. So she knows. How can she know? Physics and maths says so.. is this real information?
14. we could in fact be living inside a black hole with our universe. The sudden inflation perhaps galaxies that were swallowed by the blackhole the soup in the beginning after our big bang, may be the reconsttuction of those swallowed galaxies shredded to bits and bytes and reconstructed again in our universe. Information is not lost, the galaxies are not destroyed but teleported to another new universe. That is why we find galaxies much older than our own universe!!
15. The radius of the black hull is wrong because the space in between can't be measured conventionally like a tangent line in proximity but not too close to the roche limit of the black hull.
16. why four he be calling that shit around the event horizon information or even hidden info if its entropied? Doesn't that make it disinformation?
17. It doesn't matter how large a wavelength photon you throw into the black hole, I'll know which SIDE you threw it in from. That's information!
18. It wasn't covered why Bob/molecule doesn't get affected by Temperature as moving through the Horizon?
19. The evidence you used to deduce the composite structure of atoms is right in front of your eyes to deduce the composite structure of leptons and bosons - e.g. photons interact (exchange matter) with the vacuum (with the largest dark matter composite particles which comprise photons). Your antiparticles are surrounded by empty states of visible matter (dark matter) where your particles are surrounded by stable states of matter. Black holes are dark matter sinks and their mass density field would simply disintegrate any visible object by sucking the matter from it.