c = constant is still under discussion in this group

This matter is not solved in this group.
It may be that it is solved, but I don't know the source.
One link I've found but can't recover, was optical with interference.
The various techs to measure c are, except of Römer, TWLS.

We are now in a position to measure this exactly with radio signals
from manmade spacecrafts, that have an increasing distance to Earth.
This condition is necessary otherwise one could argument against the
method.
So there is some "c + v" given.

On Earth simply two antennas are placed at some distance, say around 10
km with 1cm accuracy to have resolution of 10e-6. Measurements are done
when the antennas are "one behind the other" in direction to the
spacecraft.

A clock at the same distance to both antennas supplies time marks to
the x-axis of oscilloscopes at both antennas where the received signals
are viewed. So here the time between a significant "mark" in the signal
can be measured e.g. a phase jump in the modulation.
With a cw signal this measurement is not possible. So I think, that
carrying out this with light will have some problems to find a "mark"
in the incoming light, but I'm no expert for this.

So we have s = distance between antennas
te = s/c which also can easily measured with a signal originating from
a source on earth.
This time is used to "calibrate" the distance between the antennas.

If signals from the spacecraft are coming in with c + v then we would
measure
tn = s/(c + v) If v would be 3 km/sec then we have a a ratio of
c/c+v according
(but also at certain times in the year you have +- 30 km/sec
additionally. don't forget).
tn can also be written for v <<c as tn = te(1 +- v/c)
So you see the experiment is quite robust to deviations of the distance
s.

Now we compare te and tn. If there is a difference Einstein is wrong
and the Non Sirians can jubilee.

Indeed if tn = te this is not to explain with logic. But if light or
em-waves behave so, we must accept it, as Einstein did as a physical
secret unsolved to date. May be the Non Sirians can't accept this. We
will see.

I hope the setup is clear. May be this was already carried out, but i
found no reference.
If something is overseen from me, I see it in yr comments, friendly I
hope!
Rudi

.

Relevant Pages

  • Re: c = constant is still under discussion in this group
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  • Re: c = constant is still under discussion in this group
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    (sci.physics.relativity)