A double split experiment is performed with light of wave length 500 nm A thin film of thickness 2um and refractive index 1 5 is

Question

A double split experiment is performed with light of wave length 500 nm A thin film of thickness 2um and refractive index 1 5 is introduced in the path of the upper beam The location of the centrs maximum will A Remain un shifted B Shift downward by nearly two fringes C Shift upward by nearly two fringes D Shift downward by 10 fringes

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