RE: Ultimate free lunch ?
April 5, 2011 at 4:49 pm
(This post was last modified: April 5, 2011 at 4:55 pm by Anomalocaris.)
(April 3, 2011 at 1:07 pm)reverendjeremiah Wrote: Also what does Hawking radiation from the poles of black holes do for this? Does that mean the exact amount of energy being consumed by a blackhole is equally ballanced by the amount of Hawking radiation coming out of it?
No. when a quantum fluctuation occurs near the event horizon such that results of the fluctuation escapes as hawkings radiation, the exact amount of energy radiating away as hawkings radiation is being subtracted from the total energy content of the blackhole. Thus the net energy of the fluctuation remains zero. Since quantum fluctuation occurs continuously near the event horizon, a blackhole not being replenished by infalling matter is gradually losing mass to facilitate the hawkings radiation. Eventually all blackholes will gradually return all of their energy/mass back to the universe outside through hawkings radiation and completely disappear. So it is not true that nothing can return from black hole. In fact the blackhole keeps nothing and returns everything, if you wait long enough. The net mass/energy removed by black hole from the universe outside its event horizon over the long run is ultimately exactly zero.[/i]
