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From: carroll@uiucdcsb.CS.UIUC.EDU
Newsgroups: net.space
Subject: Re: Unified Field Theory and space trav
Message-ID: <15700024@uiucdcsb>
Date: Tue, 12-Nov-85 16:09:00 EST
Article-I.D.: uiucdcsb.15700024
Posted: Tue Nov 12 16:09:00 1985
Date-Received: Thu, 14-Nov-85 00:46:46 EST
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Nf-From: uiucdcsb.CS.UIUC.EDU!carroll    Nov 12 15:09:00 1985


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.