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From: Shinbrot.WBST@PARC-MAXC.ARPA
Newsgroups: net.physics
Subject: Re: M = E/C^2 ??? How??? - (nf)
Message-ID: <13409@sri-arpa.UUCP>
Date: Mon, 7-Nov-83 11:05:00 EST
Article-I.D.: sri-arpa.13409
Posted: Mon Nov  7 11:05:00 1983
Date-Received: Wed, 9-Nov-83 07:32:46 EST
Lines: 11

Alternatively, "How to convert energy into mass?"

You can just observe a 1 MeV gamma-ray passing through a magnetic field.
The 'virtual' positron-electron pairs can be split by the field into
actual electrons and positrons.  Converting energy into mass without
anti-particles is not, to my understanding, possible*.

- Troy

*although some funny-business can be done, yielding quarks and
anti-quarks in boson-pairs [e.g. u(d-) + (u-)d].