Michelson-Morley Experiment
Consider the speed of the earth in its orbit?
With respect to (wrt) the sun, the speed is about v = 2 p 1.5 x 108 km / yr = 3 x 104 m/s = 30 km/s
Small compared to c = 3 x 106 km/s !
From the “swimmer problem” the time difference is T1 – T2 = 2w/c (?2 -?)
Putting in numbers for w = 11 m, T1 – T2 = 3.7 X 10-16 sec