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From: hitlong@yahoo.com (gharnagel)
Newsgroups: sci.physics.relativity
Subject: Re: A Relativist Beginning a Reasonable Defense of Relativity
Date: Tue, 5 Nov 2024 13:20:46 +0000
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On Wed, 30 Oct 2024 20:57:14 +0000, LaurenceClarkCrossen wrote:

> Wozniak: It is a known fact that the relative motion of the Sun and
> Sirius is -5.5 m/sec as they are moving towards each other. It is not
> known which is moving towards which.

That's not the total relative motion, that's the radial motion, called
"closing speed."  The tangential motion is much larger (~17 km/sec).
Motion is relative so to determine "which is moving" requires specifying
a reference point.  The presumed reference point is probably
heliocentric.

> This is known from the frequency of the light waves. If the Sun is
> moving towards Sirius, this shortens the frequency as certainly as
> Sirius moving towards the Sun. Take just the case of the Sun moving
> towards Sirius. Then, the frequency is shorter

Frequency isn't "longer" or "shorter."  It is either higher or lower.

> because the speed of the starlight from Sirius is C + 5.5 m/sec.

Completely false for two reasons.  (1) It's not 5.5 m/sec, it's 5.5
km/sec.

(2) Using the test equation c' = c + kv:

K. Brecher, "Is the Speed of Light Independent of the Velocity of the
Source?", Phys. Rev. Lett. 39 1051–1054, 1236(E) (1977).

"Uses observations of binary pulsars to put a limit on the source-
velocity dependence of the speed of light. k < 2 × 10−9.  Optical
Extinction is not a problem here, because the high-energy X-rays
used have an extinction length considerably longer than the distance
to the sources."

So the assertion that c' = c + v is refuted to 1 part in a billion.
This justifies the claim:

"Any ray of light moves in the 'stationary' system of co-ordinates
with the determined velocity c, whether the ray be emitted by a
stationary or by a moving body." ―Albert Einstein 1905

"It doesn't matter how beautiful your theory is, it doesn't matter how
smart you are.  If it doesn't agree with experiment, it's wrong."
-- Richard P. Feynman

"It is surely harmful to souls to make it a heresy to believe what
is proved." -- Galileo Galilei