Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site ucbvax.ARPA Path: utzoo!linus!decvax!ucbvax!rimey 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)