Re: black hole radius question please

Dear Faye Kane:

"Faye Kane" <fayekanegallery@xxxxxxxxxxx> wrote in message
news:1183136466.726442.159310@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
In a different post, someone said that black holes are
macroscopic and not subject to quantum effects.

Well, charge and gravitation "make it out", so I don't know how
true that is.

How can the be? I thought the radius decreased
continually due to unending collapse. (I am not
talking about the radius of the event horizon). If
a black hole continues to shrink, won't it become
smaller than a quark or a string?

Try and use a different term for the matter / energy contained
with the event horizon. "Black hole" includes the event
horizon...

Yes it is believed that it all collapses to a central
singularity.

How long will that take?

Depends on a number of things. Fractions of a second most
likely, if there is a central singulartiy, and the black hole is
small.

And if not, what keeps it from shrinking further?

That is why it is called a singlarity.

I know that space

.... spaceTIME ...

is bent almost 90 degrees next to a mass this dense,
but I would think that the definition of the spatial extent
of a black hole would still have some meaning.

It does... "the event horizon". Beyond this, we only have
"central singularity".

David A. Smith


.

Relevant Pages

  • Abandon hope all ye who enter here
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    (sci.physics.relativity)
  • Re: CMBR and neutron stars
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  • Re: Can Black Holes move?
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  • General Relativity Without Singularities
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    (sci.physics.relativity)
  • Re: Inside a black hole
    ... No. Consider that the fastest thing in the Universe is light, ... the singularity (more correctly, the event horizon). ... Outside the black hole, one could describe our entire Universe ...
    (sci.physics.relativity)