General Relativity Lecture 6
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(October 29, 2012) Leonard Susskind presents the physics of black holes including the event horizon, the photon sphere, and the singularity. This series is the fourth installment of a six-quarter series that explore the foundations of modern physics. In this quarter, Professor Susskind focuses on Einstein's General Theory of Relativity and in this lecture Leonard Susskind moves the course into discussions of gravity and basic gravitational fields. Stanford University: http://www.stanford.edu/ Stanford Continuing Studies: http://csp.stanford.edu/ Stanford University Channel on YouTube: http://www.youtube.com/stanford
Comments
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The part of this lecture from 1h8m to 1h47m blew my mind, but also clarified a lot of questions I had about what goes on around a black hole from various perspectives. I understand the math, but am still struggling to understand the concept of how the coordinates of space and time flip inside the event horizon.
And, can proper time continue past the singularity?
Anyway, really good lecture series so far. The first few lectures were dry, but the geometry math had to be introduced somehow. -
1:52:00 - Lame answer. In other words I do not know what I am talking about. Also in the top Quadrant everything moves faster than light. How does Bob (or anything) go into that Quadrant ever? On one hand he says these are just co-ordinates - OTOH he says Bob goes here - bob goes there - so which is it? Does it mean that all these craziness can be resolved by proper co-ordinate choice? Not a good video to learn from - too much hand waving going on here.If the space becomes time and time becomes space, won't the lightcone flip 180 degrees?
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I already knew this but was helpful in my revision. At 1.01.49 most memorable line ; Hard to Hide from your enemy...
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Imagine sticking your head into the photon sphere and seeing the back your own head. The photo sphere sounds like a niche spot to set up a Barbers shop.
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So much better than watching CNNs coverage of American politics!!!!!
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Don't fuck with Alice. She will freaking throw you into a black hole!
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Is it a graduate level course ?
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pfew, this is rather complicated?
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new age psycho-babble woo-woo bullshit. get your tinfoil hat back on and sit back in your crystal circle.
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This is all B/S except for tidbits conjured-up as "Proof". All of this is useless without Unitivety, and the Unitive equations. SO Shut up and sit down, you Orthodox puke.The reason Science can't see it is from Universe still spinning around them. I revolve around LOve, so Universe don't spin around me. Going From: I AM to I Am LOve. Life is a Six Word Journey, that you all Scientists, that can't "Keep it Simple, Stupids", make way too Dangerous.
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''the black hole goes and meet the heavy object''. BLACK HOLES EAT PLANETS BY PHAGOCYTOSIS!
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Mind blown, that proof for evaluating the curvature of the event horizon was brilliant.
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feel free to try.
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why not both?
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Someone just claimed Stanford created matter from nothing. He then gave me the link and I saw that it was talking about a photon-photon accelerator that created an electron and positron. I mean, he had the paper-- he gave me the link. I just... Dahhh... Just... DAAHH!
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Very interesting lesson
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Lenny @ his best.....# 7 & 8 really take the cake !.....huge thanks to him & Stanford
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agreed, nice to be able to have all this just for free o.o
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finally some physics, and can do it all with special relativity and classical mechanics, no general involved in this one and lectures 1 - 5 were just geometry, long wait for the fysix
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Is this the regular Hamiltonian action? If it originates from GR what is its name in the bibliography? Certainly not the Einstein action...
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