Hawking Radiation

[Gibsons]

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:

 

[PooBeetle]

easy.
you are caught on speed (gravity gradient)

whereas quantum events demonstrably occur instantaneously (such as paired particle creation and quantum tunnelling)

the speed of light event horizon pushes the uncertainty down to zero, which is forbidden, thus another particle is created that is the inverse (has all his freedom (uncertainty) returned ) and opts for maximal normalcy despite the constraints imposed by his environment, (thus the spectrum of radiation shows a normal (n-shaped) distribution instead of the 100% red shift you would have expected) which leads to light/radiation directly away from the object limiting his uncertainty. this is the same effect as a hose pumping out matter.

is the cat orbiting a blackhole, and considering going over the event horizen alive or dead?
if he's definitely dead, (he definitely just went over the edge) then that's forbidden because he lost all of his uncertainty, so he is then instantaneously forced to be as alive as possible, which means travelling perdendicular to the horizon. blackbody radition works in a similar statistical fashion.


there are many physics discussion boards elsewhere for a mathematical description of the transmogrification of slavery into freedom

have you heard of a device called google?
http://en.wikipedia.org/wiki/Black_hole_thermodynamics
i got a virtual pair production treatise on the first page i looked at.

 

[MagnusTheBrewer]

I just don't grok grokk. 🙂

 

[silverpig]

The simple answer is the black hole produces the energy contained in the curved space from which the virtual pair pops out. One particle escapes, thus some of the energy contained by the black hole leaves.