Re: Light Clock Nonsense

From: Paul B. Andersen (paul.b.andersen_at_deletethishia.no)
Date: 12/09/04 

Date: Thu, 09 Dec 2004 10:22:15 +0100

jahn wrote:
> Do the calculation again, but "Zeno style".
> When the RM observer sees the "Elmo" has moved
> one S distance on the the hypotenuse, ask youself
> (you should be good at this by now ) ask your self
> what the mechanism is causing Elmo to reverse directions
> for the rail passenger but continue onward for the
> embankment obsever.

I won't bother to try to decipher this babble.
If you have a point, state it in English, please.

> That is surely how you mean these calculations interpreted:
> ----------
>
>>> Paul:
>>> <<Since the speed of light in the observer's rest
>>> frame according to the second postulate i c,
>>> the light will use the time d/sqrt(c^2-v^2) between
>>> the mirrors.
>>> The moving light clock will thus run at the frequency
>>> f' = (c/2d)*sqrt(1 - v^2/c^2) = f*sqrt(1 - v^2/c^2)
>>> observed in the observer-frame.
>>> The moving light clock runs slow. >>

There is nothing wrong with this calculation.
What is your problem?
Is there any particular part you don't understand?

> ----------
>Paul B. Andersen wrote:
>>You know, the fact that the two observers in
>>my scenario above had to point their telescopes
>>in different directions doesn't affect the star.
>>But since that is beyond you, you insisted
>>that they had to point their telescopes in
>>the same direction.
>
>
> Check back through the thread. I think you'll
> find that is YOUR statement.

OK.

Paul B. Andersen wrote:
| I have a simple question for you.
| Two observers are looking at the same star
| through their respective telescopes.
| The observers are moving at v relative to
| each other along a line perpendicular
| to the line of sight to the star.
| At the time they are passing each other,
| are their telescopes then parallel?
|
| You don't have to invoke SR to arrive
| at the correct answer, which is "no".
| (Which is why your confusion puzzles
| me a little. You object to matters which
| no sane person dispute, even if said person
| don't "believe" in SR.)
|
| The angle between the telescopes is:
| According to
| .. the Galilean transform: arctan(v/c)
| .. the Lorentz transform: arcsin(v/c)
|
| The difference is minute unless v is very high.

Sue/Jahn responded:
| Stars don't shoot bullets so your wasting your own time.
| ... not mine

I interpret this as a disagreement.

So I repeat:
You insisted that they had to point their
telescopes in the same direction.

If you think otherwise, you better explain
how to interpret your remark above.

Paul

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