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From: bl@hplabsb.UUCP
Newsgroups: net.space
Subject: Re: Unified Field Theory and space trav
Message-ID: <3172@hplabsb.UUCP>
Date: Thu, 14-Nov-85 13:06:39 EST
Article-I.D.: hplabsb.3172
Posted: Thu Nov 14 13:06:39 1985
Date-Received: Sat, 16-Nov-85 08:49:24 EST
References: <1024@decwrl.UUCP> <15700024@uiucdcsb>
Organization: Hewlett Packard Labs, Palo Alto CA
Lines: 20

> 
> For math types, the important quantity is sqrt(1-(v/c)**2). If we call that
> R, then time, mass, and length change as follows, from the viewpoint of
> someone on EARTH! Please note, everything depends on who is the observer.
> T' = T * R
> M' = M / R
> L' = L * R
> 
> 	Where T',M',L' are what you see while the voyagers are traveling
> rapidly, and T,M,L are what they were just before they left. So, when v
> is close to c, one hour on Earth (T) becomes a very small amount of time
> on the ship (T'). The inevitable question is: "I thought it was all relative,
> why don't the voyagers see Earth as running slow in time?", or the Twins
> Paradox. The answer is that someone (the voyagers) accelerated, and the other
> people didn't, and that distinguishes them. Accleration and gravity slow
> down clocks too, just like high speeds.

OK, lets rephrase the question.  The two twins get into identical space ships
and accelerate at the same amount but in opposite directions.  What do they
observe about the other?