Re: Light Clock Nonsense

From: jahn (susysewnshow_at_yahoo.com.au)
Date: 12/09/04 

Date: Thu, 9 Dec 2004 06:08:35 -0500

"Paul B. Andersen" <paul.b.andersen@deletethishia.no> wrote in message news:cp95g8$hh3$1@dolly.uninett.no...
> 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.

WHERE ? Google the archives or shut up.

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

Why? You already all about that.

But you don't know how the reflectors
at VLTI are aimed and ya don't know
how all four can catch the same bullet.

Sue...

>
> Paul

Relevant Pages

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