Re: Lightspeed constant...

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#353284

From: JW
Date: Wed, 13 Nov 1996 00:00

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JeffBD wrote:

> Two bodies are both moving at 3/4 the speed of light towards each other.
> Doesn't this mean that relative to one of the bodies, the other body is
> travelling at 1.5 times the speed of light? If this is possible, doesn't
> this apparently violate the so-called constant of C? If not, why not?

No.  Speed is a function of time, right?  We have, oh say, meters per
SECOND.  But as you approach the speed of light RELATIVE to another
person, that other person you are heading towards perceives your time as
slowing down.  Thus your time is faster than his time, and his speed is
thus slower.  So if you were then to see his speed traveling towards you
compared with light traveling toward you, the light would still be
moving faster.

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From: JW <jd_...@uclink4.berkeley.edu>
Subject: Re: Lightspeed constant...
Date: 1996/11/13
Message-ID: <328A59AE.7376@uclink4.berkeley.edu>
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references: <569rgm$fu1@bigboote.WPI.EDU> <SHESS.96Nov12094002@howard.one.net> <56abof$c2a@csugrad.cs.vt.edu> <32892F92.415@extro.ucc.su.oz.au>
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