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From: robison@uiucdcsb.UUCP
Newsgroups: net.physics
Subject: Re: "big bang" a big bust?
Message-ID: <10800012@uiucdcsb.UUCP>
Date: Sat, 1-Dec-84 14:29:00 EST
Article-I.D.: uiucdcsb.10800012
Posted: Sat Dec  1 14:29:00 1984
Date-Received: Tue, 4-Dec-84 04:54:57 EST
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Nf-From: uiucdcsb!robison    Dec  1 13:29:00 1984

I can't answer the question, but it does bring up an interesting point.

Light can't escape from within a black hole, but information can.

Two pieces of information escape from a black hole - its mass and angular
momentum.  The mass can be found from the strength of its gravitational field.
As I remember (from a physics lecture) the angular momentum can be found by
sending a satellite around the black hole.  The satellite will return rotated
as I recall, though I don't really understand why.  It probably has something
to do with the curvature of space around the black hole.

It would seem that information transmission is not necessarily bound by
the properties of light.  Any comments?

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