(November 6, 2014 at 2:15 am)JaceDeanLove Wrote:(November 5, 2014 at 9:24 pm)vorlon13 Wrote: Hawking radiation is what (eventually) disperses black holes so we don't need white holes.Do you mind explaining Hawking radiation a bit further? I'm a high school student, and I'm independently studying physics, so I'm really interested; I'm especially interested in the cosmos.
BTW, when I typed eventually, I really meant it. the process takes a VERY long time. But everything in a black hole someday dribbles out.
Well... There are several ways one can approach this. The usual picture is as follows: the event horizon of a black hole, which is the sphere around it within which gravity becomes so strong that light cannot escape any more, has some peculiar properties. For example, pairs of virtual particles pop out of the vacuum all the time. Under normal circumstances, one only notices their effect when other particles are there which interact with them, i.e. in the lamb shift in atoms. If there is an event horizon, and thw virtual pair is created near it, it can happen that one of the two escapes, while the other gets trapped in the black hole. For somewhat complicated reasons, it can carry negative energy into the black hole, this decreasing its mass. The guy who escapes carries this energy away. These particles are called hawking radiation. A related effect, the Unruh radiation, is theoretically seen by accelerated observers. In this case, there is a kind of fake event horizon seen by the accelerated observer without there being a black hole.
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
Psalm 14, KJV revised edition
