Re: The relationship between meter, speed of light and c

In sci.physics.relativity, kenseto
<kenseto@xxxxxxxxxx>
wrote
on Sat, 17 Feb 2007 09:45:16 -0500
<45d713c6$0$16690$4c368faf@xxxxxxxxxxxxxx>:

"The Ghost In The Machine" <ewill@xxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:414da4-sjj.ln1@xxxxxxxxxxxxxxxxxxxxxxxxxx
In sci.physics.relativity, bz
<bz+spr@xxxxxxxxxxxxxxxxxxxx>
wrote
on Wed, 14 Feb 2007 14:24:48 +0000 (UTC)
<Xns98D7561C899EEWQAHBGMXSZHVspammote@xxxxxxxxxxxxxx>:
The Ghost In The Machine <ewill@xxxxxxxxxxxxxxxxxxxxxxx> wrote in
news:sidaa4-a91.ln1@xxxxxxxxxxxxxxxxxxxxxxx:

In short, I consider IRT is a hopeless muddle, though it
might be repairable to some extent --

Doubtful.

Have you ever tried to pin down what 'absolute' means to him?

It is kind of like what most people mean when they say 'relative' except
that 'absolute motion' is alway vertical wrt the local gravity.

I did note that, and that does pose a pretty problem which is not SR
related (since gravity kinks things in the reference frame).

You always misinterpreted what IRT says. IRT says that frequency shift of a
light ray is the result of absolute motion of the detector wrt the light ray
or interpreting the other way the arrival speed of the light ray is varying.
On earth when a source is in the vertical direction the detector directly
under the source detects red frequency shift. This means that the the
arriving speed of the light ray is slower than c.

Ken Seto



And how, precisely, does one resolve the following scenario?

Three spacecraft (A, B, C) travel along a straight
line, along with a marker buoy (O). All four items are
equipped with masers, frequency counters, and wavelength
measurement devices. (I use masers since they're rugged
enough apparently to put in a Redstone Rocket -- a la
Gravity Probe A. It doesn't matter overly much.)

SR's frequency predictions for this scenario are as follows;
these are expressed as ratios. In IRT one might express
R(v_ab) = Fab/Faa, for example.

O A B C
O 1 R(v_a) R(v_b) R(v_c)
A R(v_a) 1 R(v_ab) R(v_ac)
B R(v_b) R(v_ba) 1 R(v_bc)
C R(v_c) R(v_ca) R(v_cb) 1

where R(v) = sqrt(1-v/c)/sqrt(1+v/c),
v_ab = v_ba = (v_b-v_a)/(1-v_b*v_a/c^2)
v_ac = v_ca = (v_c-v_a)/(1-v_c*v_a/c^2)
v_bc = v_cb = (v_c-v_b)/(1-v_c*v_b/c^2)

SR's wavelength predictions are:

O A B C
O 1 W(v_a) W(v_b) W(v_c)
A W(v_a) 1 W(v_ab) W(v_ac)
B W(v_b) W(v_ba) 1 W(v_bc)
C W(v_c) W(v_ca) W(v_cb) 1

where W(v) = sqrt(1+v/c)/sqrt(1-v/c).

If O is assumed motionless with respect to the absolute origin,
how does one reconcile these predictions?

If O is *NOT* assumed motionless with respect to the absolute origin,
SR postulates no changes in these predictions, despite the fact that
everyone has (presumably) increased absolute motion.

--
#191, ewill3@xxxxxxxxxxxxx
GNU and improved.

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