Lecture 5 | Topics in String Theory

[@joabrosenberg2961]

Penrose diagrams for Flat Space and BH; Birkhoff theorem 19:00; Creating a black hole 25:00; Defining the horizon 36:00; BH and Quantum Mechanics 48:30; An atom falling into the BH 1:04:00;

[@eeshtarr]

Btw, 3 K == about 1 mm (for the peak of the black body radiation). So, 'about a moon's mass' sounds OK.

[@nurlatifahmohdnor8939]

PENNSYLVANIA 1 2. William H. Gray III (D) 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19. William F. Goodling (R) 20 21 22 23. William F. Clinger, Jr. (R)

[@ruchi9917]

I don't understand why both can't happen simultaneously when you pass the event horizon. You can still be ionised by the temperature and mutilated because of the singularity

[@ghettothugroaches]

1:00:16 EXCEPT for the fact that the Density of the Black hole further and further in could "restrain" the molecules, thus affecting their output of Kinetic Energy.

[@abuhajara]

wow. Good stuff.

[@sherlockholmeslives.1605]

I think I'd struggle doing a degree at university level. Your right of course! Good stuff! This is the real deal! Happy Christmas and New Year to You and All Your Family!! - Cheers - Mike.

[@starfannnn]

I have a question about when the black hole forms. Indeed, from somebody staying on the outside, why doesn't it take an infinite amount of time for the black hole to form itself ? I feel like the light rays that are on the shell, seen from "Bob's" perspective, should take an infinite amount of time to get to what would be the event horizon. Aren't they also "slowed down" because of the curvature that the compact energy creates ? (and more and more slowed down as they get closer to the horizon ?)

[@Dyslexic-Artist-Theory-on-Time]

Could quantum mechanics represent the passage or Arrow of Time? This theory is based on just two postulates, 1.The first is that the quantum wave particle function explained by Schrödinger’s wave equation represents the forward passage of time or Arrow of Time itself photon by photon, quanta by quanta or moment by moment. 2. The second is that Heisenberg’s Uncertainty Principle that is formed by the wave function is the same uncertainty we have with any future event. No strings!

[@Sam_on_YouTube]

An artist theory on the physics of 'Time' as a physical process. Quantum Atom Theory The QM derivation of the arrow of time is a process called "Decoherence". It is a statistical process similar to the classical arrow of time in thermodynamics, making it so unlikely as to be practically impossible for time to flow backwards, even in a time-semetric theory. It is the process of a superposition interacting with the environment (in other words being "observed") and seperating into distinct events. This holds regardless of whether you take the maby worlds view that each distinct event happens or the more conventional view that only one of them happens.

[@Throred]

Thx stanford.

[@grunder20]

what does STRING THEORY really mean?

[@nateUnofficial]

If Mike Ehrmantraut taught physics.

[@nurlatifahmohdnor8939]

Page 1010 resale price maintenance = n the practice by which a manufacturer establishes a fixed or minimum price for the resale of a brand product by retailers or other distributors. US equivalent: fair trade. Abbrev.: rpm.

[@nurlatifahmohdnor8939]

Page 634 ISA = n acronym for individual saving account: a tax-free savings scheme introduced in the UK in 1999.

[@nurlatifahmohdnor8939]

Page 128+1 On January 6, President Ronald Reagan signed into law a federal tax increase on gasoline and diesel fuel, the first federal gas increase in 23 years; the five-cents-a-gallon increase (to nine cents), which took effect April 1, was expected to raise $5.5 billion a year during the next ten year.

[@SimonJackson13]

Eye ball light and temperature

[@Sam_on_YouTube]

I have a question. First, let me say that this explanation of Heisenberg is common, but misleading. It is really an explanation of why you can't get around the uncertainty, but the uncertainty itself is more fundamental. If this were the only level of explanation, the work of people like John Bell would not have been so important to the understanding of what is going on (or not going on) in a quantum system. So my question is, is there a known deeper understanding of the resolution to the paradox he stated? "We can't measure the contradiction" seems a rather poor explanation of why we shouldn't worry about the contradiction.

[@davidwilkie9551]

This video is about Professor Susskind's String Theoretical Vibration ideas, 10 years ago, so another recent update would be better to make parallel abstract QM-TIME Completeness Commentary.., ie I'm not sure if I've ever got the intended explanation of AdS/CFT Holographic Principle Imagery that is, by default, a companion Theoretical approach to universal Black-body Singularity => holography, reasoning. Observables get renamed.

[@KrzysztofDanielCiba]

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