Re: The Fuhrer Principle

On Sat, 28 Jan 2006 07:12:51 -0500, Mark Goldberg wrote:
> The definition of a black hole includes the fact that not a molecule of
> matter can be gotten out of one.... thus it's not difficult to take
> matter out- it is by definition impossible.

Actually... As I understand it, black holes can emit particles and
photons. Google 'Hawking radiation'.

The Hawking luminosity L of the black hole is given by the usual
Stefan-Boltzmann blackbody formula:

L = A sigma T4

....where A = 4 pi rs2, and is the surface area of the black hole, and
sigma = pi2 k4 / (60 c2 hbar3), and is the Stefan-Boltzmann constant.

If the Hawking temperature exceeds the rest mass energy of a particle
type, then the black hole radiates particles and antiparticles of that
type, in addition to photons...

<http://casa.colorado.edu/~ajsh/hawk.html>

--
Karim <remove SPAMFREE: karimSrPaAsMhFaRdEE at gmail dot com>


.

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