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Cours interférence diffractionLicences P et PC 3AUniversité de LyonUniversité <strong>Jean</strong> <strong>Monnet</strong>Exercice 12 : Michelson interferometerConsider the following configuration of the Michelson interferometer where L 1 = L 2 andmirror M 2 is tilted of an angle .1- Give the expression of the intensity in the (x,y) plane (the screen) if the source ismonochromatic.2- Actually, the source emits two close wavelengths 1 and 2 such that 2 1 +What isthe expression of the intensity on the screen in that case. Draw the function I(x).3- What happens (on the screen) if the mirror M is translated along the x axis?4- Consider now a white light source and calculate the expression of the intensity on thescreen. Draw a sketch of the interference pattern observed on the screen. How would be theinterference pattern without the compensator plate ?5- We introduce a thin film of polymer in one arm of the interferometer illuminated withwhite light. What happens on the screen. How can we measure the film thickness ?