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A thin film with index of refraction n = 1.42 is placed in one arm of a Michelson interferometer, perpendicular to the optical path. If this causes a shift of
9.0 fringes of the pattern produced by light of wavelength 556 nm, what is the film thickness? Answer in micrometers. Please help!


A Thin Film With Index Of Refraction N 142 Is Placed In One Arm Of A Michelson Interferometer Perpendicular To The Optical Path If This Causes A Shift Of 90 Fri class=