[Physics] Arguments for or against the variable time (of

[O. Serret]

Hi Doug,

Sorry, I don’t understand what you mean.

Sagnac effect is  dt = 4 Pi w R^2 / c^2
It is explained by the fact the two photons do not travel the same distance
In this case, there is no composition law for velocity

Could you precise what you mean by “Fresnel drag does occurin the Fiber optic gyroscope” ?

Thank you
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