Re: Twin paradox
From: David Cross (nospam_at_spammenot.com)
Date: 03/19/05
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Date: Sat, 19 Mar 2005 17:04:58 GMT
"Julian" <becker.julian@gmail.com> wrote in message
news:88074b3c.0503190501.4935c991@posting.google.com...
>I only wanted to ask if anybody knows why the twin that takes the
> tour isn't shortened, as an effect of length contraction? If time and
> space are equally treated - why should a time dilation have a real
> effect if length contraction doesn't?
It does, though. The twin that goes rocketing about in space thinks the
journey is shorter than we measure it because when that twin measures off the
distance, it's shorter.
This just isn't often mentioned in introductions to the twin paradox since the
focus is on the fact that there *is* a visible difference in the aging rates
and it *is* because the space-bound twin turned around.
-- David Cross dcross1 AT shaw DOT ca
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