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Old December 25th 07 posted to sci.physics.relativity, sci.physics, fr.sci.physique,fr.sci.maths, fr.sci.philo
Pentcho Valev
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Posts: 5,046
Default I am confused by relativity

On Dec 25, 2:38 pm, "Chris" wrote:
This would mean that the twin paradox does not occur.


It does not. If we did not live in Einstein zombie world, the
absurdity involved in the twin paradox and the concept of time
dilation in general would be easily demonstrated simply by considering
the following text of Einstein's:

http://www.bartleby.com/173/23.html
Albert Einstein (1879-1955). Relativity: The Special and General
Theory. 1920. Chapter 23:
"To start with, he places one of two identically constructed clocks at
the centre of the circular disc, and the other on the edge of the
disc, so that they are at rest relative to it. We now ask ourselves
whether both clocks go at the same rate from the standpoint of the non-
rotating Galileian reference-body K. As judged from this body, the
clock at the centre of the disc has no velocity, whereas the clock at
the edge of the disc is in motion relative to K in consequence of the
rotation. According to a result obtained in Section XII, it follows
that the latter clock goes at a rate permanently slower than that of
the clock at the centre of the circular disc, i.e. as observed from K.
It is obvious that the same effect would be noted by an observer whom
we will imagine sitting alongside his clock at the centre of the
circular disc."

One would verify Einstein's statements above, make a few modifications
in the thought experiment (e.g. the non-rotating clock at the centre
will go near the rotating periphery; there will be many rotating
clocks; the diameter of the disk will be made very long which, if the
linear speed of the periphery is kept constant, will make rotating
clocks almost inertial) and the idiocy called "time dilation" would be
rejected immediately. In Einstein zombie world the idiocy called "time
dilation" may continue to destroy human rationality forever.

Pentcho Valev

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