Wheeler (1911-2008) is a legendary figure in physics. He worked with Niels Bohr to explain nuclear fission, worked on thehydrogen bomb at Los Alamos, and taught many eminent physicists includingRichard Feynman, Kip Thorne and Hugh Everett. He was the father of moderngeneral relativity, was key in developing our understanding of black holes and, indeed, popularised the term "black hole" (after it wassuggested to him by an audience member at a conference) and coinedmany others, including "worm hole" and "quantum foam".
There is a second important consequence of the relation (24) regarding the final stage of black hole evaporation. Microblack holes are known to be semiclassically unstable because of Hawking radiation. However, the standard description of thermal decay breaks down when the black hole approaches the full quantum gravity regime. Even worse, no semiclassical model can foresee the endpoint of the process which remains open to largely unsubstantiated speculations.
geons black holes and quantum foam a life in physics pdf 12
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