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From: gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>)
Newsgroups: net.physics
Subject: Re: speed
Message-ID: <11222@brl-tgr.ARPA>
Date: Tue, 4-Jun-85 17:04:04 EDT
Article-I.D.: brl-tgr.11222
Posted: Tue Jun  4 17:04:04 1985
Date-Received: Thu, 6-Jun-85 11:24:43 EDT
References: <359@osiris.UUCP> <56@rtp47.UUCP>
Organization: Ballistic Research Lab
Lines: 8

Throop's analysis of the twins paradox is essentially accurate.
Accelerations turn out to have nothing to do with it, other
than allowing one to determine that his state of motion has
undergone a change.  A carefully drawn space-time diagram,
including the propagation of regularly-spaced light "ticks"
from each twin, will show what is happening using ordinary
special relativity.  (Send the traveling twin from point A,
where the stationary twin lives, and back.)