Question: A shift of one fringe in the Michelson-Morley experiment corresponds to a change in the round-trip travel time along one arm of the interferometer by one period of vibration of light (about 2 x 10-15 s) when the apparatus is rotated by 90 degrees.
Part A: Based on the results of example 2.3 what velocity through the ether would be deduced frame a shift of one fringe?
I need help to solve the above question and take the length of the interferometer arm to be 11 m.