From: pauld@exploratorium.edu
Date: Sun Mar 23 2003 - 19:36:36 PST
Message-Id: <200303240336.h2O3aXo08403@isaac.exploratorium.edu> From: pauld@exploratorium.edu Subject: Re: pinhole relativity Date: Sun, 23 Mar 2003 19:36:34 US/Pacific
Hi pinholers
The twin problem is not symmetric since one twin does accelerate and the other
does not.
However, the explanation does not necessarily need to use general relativity.
When the one twin turns around he simply changes special relativistic frames.
This causes all of the time changes needed to cause the differential aging
effects. The book "Spacetime" by Ed Taylor does a great job on the twin paradox.
Paul D
>
> if the problem is set up in a symmetric way (both traveling away and coming
> back) the result will be symmetric (both will have aged identically).
>
> a thorough analysis of the twin paradox requires general relativity because
> of the acceleration involved in the turn-around.
>
> -mark Lawton
>
>
>
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