Re: Question: How can graviton escape from black holes?

From: Australopithecus Afarensis (fossil)
Date: 08/29/04 

Date: Sat, 28 Aug 2004 23:05:46 -0700

>>"...the black hole is a kind of "frozen star": the gravitational field is
>>a fossil field."<<

So, a black hole actually takes the entire age of our universe to form. If
the age of our universe is infinite such as an open or flat one, it would
never exist. Since a black hole can only exist at the end of time (whatever
that means) under General Relativity, there is really no need to talk about
what would happen to the gravitational effect of a black hole.

The controversy comes when looking at an object falling into a black hole.
In the object's frame of reference, it actually experiences being pulled
into the singularity while the world outside sees this object freezes in
time until eternity. We have two frames of references that do not agree on
reality.

If you believe in a religion, you can always argue anything to preserve your
belief. Even if on something so obviously full of holes, not necessarily
black holes.

* * *

"Eric Gisse" <fsegg@!SPAMuaf.edu> wrote in message
news:emm2j05kua4p4mbjkdqhvkccsh8ckjjr4k@4ax.com...
On Sat, 28 Aug 2004 21:59:55 -0400, Aliens <aliens243@hotmail.com>
wrote:

>Hi
>Everyone know that black hole have a so big mass that even photons
>can't exit from them because of the gravitattional force that curve
>space time around the black hole. Since the electro-magnetic force is
>transmitted by photons, does that mean that electro-magnetic force
>can't act between a charge inside a black hole and a charge outside?

Black holes can have spin and charge, just so you know.

>
>Also, according to quantum fields theories, the force of gravity must
>be transported by an massless virtual particle because of it's
>infinite range. I know that these graviton have never been observed,
>but according to the theories, if they exist, how can they exit from
>the curved space time around the black hole? I know that these
>graviton, if they exist, wouldn't feel the force of gravity because
>they can't act on themself, but according to general relativity,
>gravity does curve space-time. So, how black-holes can have a gravity
>field outside the critical radius?
>
>On the same subject, if gravitationnal waves exist as predicted by
>general relativity, could we, theorically, use them to communicate
>from the interior of a black-hole to the exterior?
>
>Btw, sorry for my english, it's not my first language...
>
>Thanks for your help.
>Aliens243

The physics FAQ is useful.

http://math.ucr.edu/home/baez/physics/

Specifically...

http://math.ucr.edu/home/baez/physics/Relativity/BlackHoles/black_gravity.html

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