Re: Trying to understand a "paradox"
From: Harry (harald.vanlintel_at_epfl.ch)
Date: 11/29/04
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Date: Mon, 29 Nov 2004 09:37:59 +0100
"Maury Markowitz" <maury_markowitz@hotmail.com> wrote in message
news:41A90774.60909@hotmail.com...
> Harry wrote:
> > As interpreted from the embankment, what happens is that due to the
train
> > moving towards the embankment clock's light rays, the train occupants
will
> > estimate the embankment clock to be ahead of the train clock, right from
the
> > beginning
>
> Ok, this is the part I wasn't getting. In retrospect it seems obvious
> after reading some of the explainations of the twin paradox. As I
> understand it now, there are two cases:
>
> 1) you were always moving, and can't compare clocks
> 2) you started moving, at which point you go into a different
> reference frame, and see other clocks advance "all of a sudden".
>
> In this case we're considering (2), so as soon as the train starts
> rolling, it will see the other clock suddenly fast-forward. Thus when it
> arrives, there's no surprise that it reads further into the future.
>
> Is that basically "it"?
>
> If so, one more wrinkle if I may...
>
> Re-run the experiment as before. However this time sync three clocks on
> the embankment. Leave on where it was on the embankment, place one on
> the train (so far no changes), but place the third 1/2 way along the
> track. Start as before, but this time when the train reaches the clock
> "in the middle", sync to it.
>
> I'm sure the solution is similar, but i'd like to hear it anyway just so
> I'm sure I'm really understanding this and not just glancing on the
surface.
Yes it makes no difference for the time sync procedure is linear, it just
changes the zero point. And sorry I'm too busy to work it out for you, you
can do it yourself for sure!
Harald
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