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From: hitlong@yahoo.com (gharnagel)
Newsgroups: sci.physics.relativity
Subject: Re: No evidence
Date: Mon, 16 Sep 2024 02:24:10 +0000
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On Sun, 15 Sep 2024 19:05:35 +0000, LaurenceClarkCrossen wrote:
>
> Gary: Given that they are isolated, how would relative velocity
> cause them to run slower? (It doesn't cause time itself to dilate.
> That is pure nonsense.)

It certainly is nonsense that velocity causes a clock to run
slower.  Clocks run at their normal rate regardless of velocity
or gravitational potential.

Relativity predicts that measuring such a clock at different
gravitational potentials or in relative motion will get different
results from measuring them when next to the clock.  This is a
fact, valid information.

https://www.nature.com/articles/s41586-021-04349-7

https://arxiv.org/abs/2109.12238

"we measure a linear frequency gradient consistent with the
gravitational redshift within a single millimetre-scale sample
of ultracold strontium. Our result is enabled by improving the
fractional frequency measurement uncertainty by more than a
factor of 10, now reaching 7.6 × 10−21."