Re: hawking radiation
- From: john_ramsden@xxxxxxxxxxxxxx
- Date: 14 Jul 2005 02:01:46 -0700
gsax wrote:
>
> I was reading "Brief Hisotry of Time", where Hawking mentions
> how a black hole can radiate..& loose mass (evaporate)......
>
> This is acccomplished by a set of virtual particle-antiparticle
> pair forming near it's event horizon... & then the anti-particle
> falls into the black hole & the article is left out as radiation
>
> Now the antiparticle falling in causes the mass of black hole to
> decrease, just as if it has been radiating a particle..
>
> My question is:
>
> Why is it that the anti-particle that falls in? there should be
> an equal probability of the particle to fall in too?
He's talking about particle and anti-particle in general terms,
as one might refer to a number x and its negative, -x, whether
or not x itself is negative (in which case -x would be positive).
What reduces the black hole mass is the energy conveyed away by
the particles that escape, and presumably these may be either
conventional ones in the sense you mean, or anti-particles.
The energy is the same for both.
.
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