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From: js2j@mhuxt.UUCP (sonntag)
Newsgroups: net.physics
Subject: Re: A question about mass and energy
Message-ID: <1014@mhuxt.UUCP>
Date: Thu, 18-Jul-85 09:58:00 EDT
Article-I.D.: mhuxt.1014
Posted: Thu Jul 18 09:58:00 1985
Date-Received: Sat, 20-Jul-85 02:07:43 EDT
References: <378@sri-arpa.ARPA> <11562@brl-tgr.ARPA>
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 18

> Indeed, a propagating plane electromagnetic
> wave violates both but does carry energy as given by its Poynting
> vector.

    A propagating electromatic wave -- an electric field and a
magnetic field chasing each other through free space -- a 'photon', right?

> In particular, the electromagnetic field is just a
> cloud of "photons", which are particles, and subsidiary particles.

    What about the electromagnetic field which makes up a photon?  How
can this be 'just a cloud of photons'?
-- 
Jeff Sonntag
ihnp4!mhuxt!js2j
   "Well I've been burned before, and I know the score,
    so you won't hear me complain.
    Are you willing to risk it all, or is your love in vain?"-Dylan