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From: rimey@ucbvax.ARPA (Ken Rimey)
Newsgroups: net.physics
Subject: Re: A Queation Regarding Black Holes
Message-ID: <9819@ucbvax.ARPA>
Date: Sat, 10-Aug-85 12:16:44 EDT
Article-I.D.: ucbvax.9819
Posted: Sat Aug 10 12:16:44 1985
Date-Received: Mon, 12-Aug-85 06:22:18 EDT
References: <625@wdl1.UUCP> <9818@ucbvax.ARPA>
Reply-To: rimey@ucbvax.UUCP (Ken Rimey)
Organization: University of California at Berkeley
Lines: 24

>>	Further, since everything with velocity <=c is kept within
>> the black hole, ...
>>				jrm@ford-wdl1
>
>No.  Matter cannot escape, but matter outside is certainly affected by
>the black hole's gravitational field.
>
>					Ken Rimey
>

I should make this more clear.

In general relativity, the force of gravity has a special status.  Particles
follow trajectories that are dependent on the curvature of space-time.  We
call the effect of the curvature on the trajectories gravity.  So, there
is space-time, and there are particles moving in it.  Gravity is not particles.

Now, you may have heard talk of gravitons and such.  This is not vanilla
general relativity.  I know nothing about theories of quantum gravity, but
I suspect that it would be difficult to calculate things about black holes
from these theories.  To understand black holes, forget you every heard of
gravitons.

						Ken Rimey (again)