/sci/ - Science & Math

>>8873404
>continued
And here is a bit from Chapter 12, the chapter I didn't read yet on the development of the ideas of Hawking radiation and understanding of a black hole's entropy.
>...the Bardeen— Carter— Hawking laws of black-hole mechanics are the laws of thermodynamics in disguise, and that, as Bekenstein had claimed two years earlier, a black hole has an entropy proportional to its surface area.
>Hawking’s calculations said more. Once the hole’s spin has slowed, its entropy and the area of its horizon are proportional to its mass squared, while its temperature and surface gravity are proportional to its mass divided by its area, which means inversely proportional to its mass. Therefore, as the hole continues to emit radiation, converting mass into outflowing energy, its mass goes down, its entropy and area go down, and its temperature and surface gravity go up. The hole shrinks and becomes hotter. In effect, the hole is evaporating.
>Thorne, Kip (1995-01-17). Black Holes & Time Warps: Einstein's Outrageous Legacy (Commonwealth Fund Book Program) (p. 436). W. W. Norton & Company. Kindle Edition.