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 gtss.UUCP Path: utzoo!linus!gatech!gtss!chas From: chas@gtss.UUCP (Charles Cleveland) Newsgroups: net.physics Subject: Re: A Queation Regarding Black Holes Message-ID: <132@gtss.UUCP> Date: Mon, 12-Aug-85 10:31:24 EDT Article-I.D.: gtss.132 Posted: Mon Aug 12 10:31:24 1985 Date-Received: Wed, 14-Aug-85 00:16:35 EDT References: <625@wdl1.UUCP> Reply-To: chas@gtss.UUCP (Charles Cleveland) Organization: Georgia Tech Surface Studies Lines: 36 Summary: In article <625@wdl1.UUCP> jrm@wdl1.UUCP writes: > >/***** wdl1:net.astro.expert / jrm / 1:03 pm Aug 6, 1985*/ > > A common science fiction theme is that of a ship orbiting > a black hole under intense gravitational and tidal forces. Another is > a ship falling into a black hole (usually with discussion of the > relativistic effects). > However.... > By definition, the gravitational feild of a black hole is so > intense that not even light or other wavicles with velocity c can escape. > My understanding is that gravity propagates with velocity c. (I believe > this has been proven. Correct?) Does this not imply that, at least as > far as the outside universe is concerned, the black hole has no > gravitational feild? > Further, since everything with velocity <=c is kept within > the black hole, does this not mean that the black hole is undetectable? > Even to the extent that you could pass through one or it could pass > through you and neither would know anything had happened? > Does quantum mechanics affect this? (In terms of "things" > escaping from the black hole.) > jrm@ford-wdl1 > >/* ---------- */ Silly me, I forgot to add "Black Hole" to my kill file for net.physics, and inadvertently read this. I'll add it now. Keep your fingers crossed-- I don't know if it can hold another one. :-) -- Charles Cleveland Georgia Tech Surface Studies Georgia Tech School of Physics Atlanta, GA 30332 ...!{akgua,allegra,amd,hplabs,ihnp4,masscomp,ut-ngp}!gatech!gtss!chas ...!{rlgvax,sb1,uf-cgrl,unmvax,ut-sally}!gatech!gtss!chas