One way speed of light in one reference frame measurement

[morrobay]

Two clocks with photo detectors are 100 kilometers apart at A and B. On the center of AB axis two light pulses are sent to the clocks , synchronizing them. Then a light signal is sent from A to B. The two stationary observers record the time from event at A to event at B. Is there a one way speed of light conundrum in this experimental setup ?

 

[anorlunda]

This has been discussed before.

https://www.physicsforums.com/threads/idea-for-finding-one-way-speed-of-light-use-one-clock.1008902/

https://www.physicsforums.com/threads/measuring-the-speed-of-light-in-a-straight-line.1003639/

https://www.physicsforums.com/threa...w-one-way-measurement-of-lights-speed.998708/

https://www.physicsforums.com/threa...asure-one-way-speed-of-light-this-way.996445/

https://www.physicsforums.com/threads/one-way-speed-of-light.996034/

 

[morrobay]

Unlike the above references my experimental setup does not include roundtrips of light signals . And furthermore as long as the speed of light is isotropic it would not be necessary to know it's speed synchronizing the two clocks.

 

[Dale]

two light pulses are sent to the clocks , synchronizing them. ... Is there a one way speed of light conundrum in this experimental setup ?

Obviously this procedure only synchronizes the clocks if the one way speed of light is isotropic. So you are assuming your conclusion.

There is no possible experiment and no clever setup that can possibly measure a one way speed of anything without some synchronization convention. That convention determines the result.

 

[morrobay]

Could atomic clocks at A and B photo detectors that are started from signal at center of AB axis determine if the speed is isotropic ? The clocks are started at t1 . Then if both clocks at any t2 have recorded the same elapsed time then it seems by construction isotropy can be determined. Ok I see the problem with this : how do both A and B agree on t2

 

[Dale]

There is no possible experiment and no clever setup that can possibly measure a one way speed of anything without some synchronization convention. That convention determines the result.