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The first image (silhouette or shadow) of a black hole, taken of the supermassive black hole in M87 with the Event Horizon Telescope, released in April 2019. The black hole information paradox [1] is a paradox that appears when the predictions of quantum mechanics and general relativity are combined.
Black Hole War: My Battle with Stephen Hawking to Make the World Safe for Quantum Mechanics is a 2008 popular science book by American theoretical physicist Leonard Susskind. The book covers the black hole information paradox , and the related scientific dispute between Stephen Hawking and Susskind. [ 1 ]
The Thorne–Hawking–Preskill bet was a public bet on the outcome of the black hole information paradox made in 1997 by physics theorists Kip Thorne and Stephen Hawking on the one side, and John Preskill on the other, according to the document they signed 6 February 1997, [1] as shown in Hawking's 2001 book The Universe in a Nutshell.
Because this particle has angular momentum, it can only be captured by the black hole if the maximum potential of the black hole is less than () /. Solving the above effective potential equation for the maximum under the given conditions results in a maximum potential of exactly ( e 2 − 1 ) / 2 {\displaystyle (e^{2}-1)/2} .
Thus, information is never lost. This has implications in the black hole information paradox and in fact any process that tends to lose information completely. The no-hiding theorem is robust to imperfection in the physical process that seemingly destroys the original information. This was proved by Samuel L. Braunstein and Arun K. Pati in 2007.
This book is a collection of essays and lectures written by Hawking, mainly about the makeup of black holes, and why they might be nodes from which other universes grow. Hawking discusses black hole thermodynamics , special relativity , general relativity , and quantum mechanics .
Einstein himself considered the introduction of the cosmological constant in his 1917 paper founding cosmology as a "blunder". [3] The theory of general relativity predicted an expanding or contracting universe, but Einstein wanted a static universe which is an unchanging three-dimensional sphere, like the surface of a three-dimensional ball in four dimensions.
If the information survives in parallel universes with no black holes then no information can exist in the first place. AnaxMcShane 12:25, 30 January 2008 (UTC). Well, I'm not sure how Mr. Hawking is coming to the conclusion that black holes couldn't or wouldn't exist in a parallel universe, but information could, would & does exist in this universe.