Re: Randy Poe's long-winded derivation of SR.

From: Androcles (dummy_at_dummy.net)
Date: 01/04/05 

Date: Tue, 04 Jan 2005 23:12:30 GMT

"Randy Poe" <poespam-trap@yahoo.com> wrote in message
news:1104877915.302108.222430@f14g2000cwb.googlegroups.com...
[snip for netiquette].

> Now, from the point of view of S, the emitter and mirror
|> are some distance d apart.
They are from any point of view.

> The light signal leaves the
> emitter at x1, at time t1.

Right.

> It is traveling toward the
> mirror at speed c,

IN THE M FRAME.

> but at the same time the mirror is
> receding at speed v.

IN THE S FRAME.

> So from the point of view of the S
> observer, the transmit time from emitter to mirror is
> d/(c-v).

WRONG. THE SPEED OF THE SIGNAL IN THE S FRAME IS c-v.

> Which means t2 = t1 + d/(c-v).

WRONG.

 t2 = t1 + [d + v (t2-t1)] / (c-v) IN THE S FRAME.

IN THE M FRAME it is t2 = t1 + d/c.

Quit mixing frames.

[snip for netiquette]

Androcles.

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