On a sunny day (Fri, 5 Jan 2007 09:31:03 -0500) it happened "Greg Neill"
wrote in
:

"Jan Panteltje" wrote in message ...
If you move to the centre of a black hole, where gravitational forces sort
of cancel, can light and normal matter exist in some area there?

Gravitational forces don't cancel because the mass of a
black hole (except for the infalling matter from its
"feeding") is located at a singlularity at the center.

But why? image for a moment matter falling into a body.
As its mass increases, the escape speed from it will increase.
At some point the escape speed will be greater then C, so light cannot escape,
we no longer see any EM waves coming from it, we call it a black hole
(is this correct?).

There is nothing that says that the thing could not be a bit hollow, its being
black only depends on the escape speed.

(I could imagine somebody compressing an object, to comprss it all the
way to the center may be prevented by the outer layers becoming too strong).


Gravitational acceleration and tidal forces increase
without limit as you approach the center.

Nobody has been or even measured anything there via remote methods.
So that would be a postulate, creating nasty infinities.
Nature does not accommodate infinities :-)

Or does the black hole simply get denser when you move towards it center,
as opposed to haveing a center with a dense shell around it (black egg)?

There's no shell. The event horizon is about as substantial
as a property line; it just demarkates the boundary beyond
which there's no escape.

I agree with that (except for 'evaporation' of particles).