- Aug 14, 2001
- 12,530
- 35
- 91
I asked this same question on this forum once before, and someone answered me, but I frankly just didn't get it.. it sorta bounced off my skull.
So anyway, I'll go through how I understand it and hopefully someone can explain to me where/why I'm wrong.
So, if you have a black hole, especially a small one, you can have a very steep gradient of gravity near the even horizon. If/when a particle - anti-particle are formed from the vacuum or space or whatever it is, the two particles can experience significantly different gravitational force from the black hole, even though they are very very close together. Thus, one particle can get dragged past the event horizon, while the other escapes. I think I"m okay up through this part.
Now, what I don't get is why this leads to a loss of mass of the black hole. As I understand it, there's no reason for the black hole to pull in more anti-particles than particles. Thus, this process should leave the black hole in an equilibrium, it loses and gains mass at the same rate. But everything I've read says that the black hole loses mass through this process. I'm about 99.99999999999.....% certain that I'm wrong and they're right. I just don't know how or why. If someone could explain it to me in small words with no differential equations, I'd appreciate it. :beer:
So anyway, I'll go through how I understand it and hopefully someone can explain to me where/why I'm wrong.
So, if you have a black hole, especially a small one, you can have a very steep gradient of gravity near the even horizon. If/when a particle - anti-particle are formed from the vacuum or space or whatever it is, the two particles can experience significantly different gravitational force from the black hole, even though they are very very close together. Thus, one particle can get dragged past the event horizon, while the other escapes. I think I"m okay up through this part.
Now, what I don't get is why this leads to a loss of mass of the black hole. As I understand it, there's no reason for the black hole to pull in more anti-particles than particles. Thus, this process should leave the black hole in an equilibrium, it loses and gains mass at the same rate. But everything I've read says that the black hole loses mass through this process. I'm about 99.99999999999.....% certain that I'm wrong and they're right. I just don't know how or why. If someone could explain it to me in small words with no differential equations, I'd appreciate it. :beer: