Michelson interferometer with rotating

At the beginning of the twentieth century, there were several isolated voices claiming for a revision of the Michelson-Morley interpretation. Hicks [52] performed a theoretical analysis of the Michelson-Morley experiment and concluded that data were consistent with a somewhat larger magnitude of the difference of speeds. More importantly, he noted that the data followed a periodic curve proportional to cos 20, where angle 0 refers to a rotation of the interferometer relative to the presumed direction of orbital velocity. The functional dependence present in the results is of the form to be expected if there existed E. 

Here, we consider as an example a possible problem with an interpretation of a classical version of the Michelson-Morley experiment. In the experiment some pieces of bulk matter were rotated. It was expected that when rotating their linear scale would not change and comparing the light propagation in different arms of the interferometer we can judge whether the speed of light is the same in different directions. 

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