Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!linus!security!genrad!grkermit!masscomp!clyde!floyd!harpo!ihnp4!zehntel!hplabs!sri-unix!buck@NRL-CSS
From: buck%NRL-CSS@sri-unix.UUCP
Newsgroups: net.sf-lovers
Subject: Density of a vacuum
Message-ID: <15672@sri-arpa.UUCP>
Date: Tue, 17-Jan-84 23:17:01 EST
Article-I.D.: sri-arpa.15672
Posted: Tue Jan 17 23:17:01 1984
Date-Received: Fri, 20-Jan-84 06:04:52 EST
Lines: 11

From:  Joe Buck <buck@NRL-CSS>

At least two people have posted messages indicating their belief that
the concept of density of a vacuum is absurd. Since density is mass
over volume, a vacuum has a density of zero.

Actually the situation is more complex. Quantum field theory shows
that all vacuums have nonzero density, because particle pairs are
constantly being created and destroyed out of nothing.

Further discussions of vacuums should probably move to the physics list.