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From: frankr@enmasse.UUCP (Franklin Reynolds)
Newsgroups: net.books,net.sf-lovers,net.physics
Subject: Re: Procyon's Promise & antimatter black holes
Message-ID: <447@enmasse.UUCP>
Date: Fri, 9-Aug-85 09:41:37 EDT
Article-I.D.: enmasse.447
Posted: Fri Aug  9 09:41:37 1985
Date-Received: Mon, 12-Aug-85 07:29:42 EDT
References: <320@baylor.UUCP> <1491@shark.UUCP> <313@ttrdc.UUCP> <560@mmintl.UUCP> <530@brl-tgr.ARPA>
Reply-To: frankr@enmasse.UUCP (Franklin Reynolds)
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In article <530@brl-tgr.ARPA> wmartin@brl-bmd.UUCP writes:
>I was thinking about the "anti-matter vs. matter" qualities of what is
>inside a black hole, and, at first, was going to agree with the
>contention that, no matter the nature of the matter that formed the
>black hole, once falls inside, it loses those qualities and becomes like
>unto the primordial ylem (do physicists still use that term?) or at least
>undefinable.
>
>Then I thought of the contentions that I have read that the entire
>observable universe could be inside a black hole. Since the radius goes
>up with the mass, the average density of a hole with the universe's mass
>is rather close to the real average density of the universe... So this
>would have to depend then on the mass of the black hole, would it not?
>After all, a black hole containing our universe could be orbiting a
>black hole containing an anti-matter universe... 
>

The way I think it is supposed to work is that there is no difference
between a "normal" black hole and an anti-matter black hole from the
outside. What is going on inside (within the event horizon) is undetectable
to an outside observer. You can think of black holes as write-only ROMs,
you can add stuff to them, but you can't get anything back.

If a "normal" black hole collided with an anti-matter black hole an outside
observer would see a larger black hole as the result. There is no telling what 
would happen on the inside of the new black hole.

Franklin Reynolds
Enmasse Computer Corp.
genrad!enmasse!frankr