Sujet : Re: "Time" vs "physical time"
De : r.hachel (at) *nospam* jesauspu.fr (Richard Hachel)
Groupes : sci.physics.relativityDate : 10. Aug 2024, 22:35:46
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Le 10/08/2024 à 21:48, "Paul.B.Andersen" a écrit :
Den 08.08.2024 19:55, skrev Richard Hachel:
OK, let's assume that the length of the tunnel is exactly 1320 km.
We are using two clocks showing UTC+2h. But they have to be
more precisely synchronised than the clocks on the airports
which can not be expected to be synchronous to much better than
within a second.
So we will us two atomic clocks which are synchronised
by GPS to show UTC+2h to within 1 ns.
The particle we will use is a photon.
A photon is sent from Oslo at the time 12.00.000000000 ± 1ns
and is detected in Paris at the time 12.00.004403046 ± 1ns
The measured speed of the photon is 299792461 ± 68 m/s
A photon is sent from Paris at the time 13.00.000000000 ± 1ns
and is detected in Oslo at the time 13.00.004403046 ± 1ns
The measured speed of the photon is 299792461 ± 68 m/s
Any problem with this?
No.
Absolutely not.
All you said is correct.
R.H.
"Time" vs "physical time"
Re: "Time" vs "physical time"