Re: Androcles asks for Derivation of LT

From: Randy Poe (poespam-trap_at_yahoo.com)
Date: 02/17/05 

Date: 16 Feb 2005 18:22:08 -0800

Androcles wrote:
> "Randy Poe" <poespam-trap@yahoo.com> wrote in message
> news:1108591352.397437.205300@c13g2000cwb.googlegroups.com...
>
> Androcles wrote:
>
> > Poe: Here's the post that my quote above actually applied to:
> >
> > > "But the ray moves relatively to the initial point
> > > of k, when measured in the stationary system, with the velocity
> c-v,
> > so
> > > that x'/(c-v) = t."
> >
> > from which (c-v) t = (c+v) t.
> >
> > Androcles. Ok, that's fine.
> > Those are distances.
>
> Correct.
>
> > Unequal distances
>
> Correct.
>
> > that are both equal to x'.
>
> Oops. Nope. The first one is longer than x', the
> second one shorter. There is nowhere any claim that
> they are equal.
>
> Ok, so x' does not equal x'.

No, remember your mosquito and the ladder. If the
ladder is x' long, the mosquito will fly more than x'
in the forward direction, and less than x' in the
reverse direction. In the forward direction, the ladder
is moving away from him, in the reverse direction, toward him.

If the distance from moving source to moving mirror is x'
in the K frame, then light in the K frame travels more
than x' to catch up with the mirror in the forward direction
and less than x' to get back to the source in the reverse
direction.

> Have a nice day in the asylum.

Just keep your frames straight, it's not hard.

You want to take another crack at pretending to read my
response, or is this your standard bailout moment when
you realized you were going to have to admit a mistake?

               - Randy

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