College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 10

A thin sheet of transparent material has an index of refraction of 1.40 and is 15.0 m thick. When it is inserted in the light path along one arm of an interferometer, how many fringe shifts occur in the pattern Assume the wavelength (in a vacuum) of the light used is 600 nm. Hint: The wavelength will change within the material.