Azelio,
Right, OCXO are not stable enough at the desired tau to do a blueshift
experiment. So that's why atomic (and now, optical) clocks are used. But
note that many experimental confirmations of general relativity, from
planets to black holes, do not involve clocks, per se. See, for example:
https://en.wikipedia.org/wiki/Pound%E2%80%93Rebka_experiment
Here's a historical summary of GR experiments from a Physics textbook:
https://www.relativity.li/uploads/pdf/English/I_en.pdf
Another good list:
https://en.wikipedia.org/wiki/Tests_of_general_relativity
And Clifford Will's classic:
https://link.springer.com/article/10.12942/lrr-2014-4
https://arxiv.org/abs/1403.7377
/tvb
On 10/30/2020 7:44 AM, Azelio Boriani wrote:
Was the blueshift only ever tested by using atomic clocks? OK, OCXOs
alone are not stable enough to try and we can't go that far from our
planet with the necessary equipment.
On Fri, Oct 30, 2020 at 2:27 PM Bob kb8tq <[email protected]> wrote:
Hi
So there might be a reason (other than NIST) to believe that frequency and
gravity are related to each other ? :)
Bob
On Oct 30, 2020, at 7:28 AM, Tom Van Baak <[email protected]> wrote:
Time Too Good to Be True, Daniel Kleppner
Physics Today, March 2006, page 10
https://physicstoday.scitation.org/doi/10.1063/1.2195297
An adventure in relative time-keeping, Tom Van Baak
Physics Today, March 2007, page 16
https://physicstoday.scitation.org/doi/10.1063/1.2718741
/tvb
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