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A ray incident on a droplet of water at an angle of i undergoes two reflections (not total) and emerges. If the deviation by the ray with in the drop is minimum and the refractive index be µ, then show that cos(i) = sqrt{ (µ* µ -1)/8}


A ray incident on a droplet of water at an angle of i undergoes two reflections (not total) and emerges. If the deviation by the ray with in the drop is minimum and the refractive index be µ, then show that                               


        cos(i) = sqrt{ (µ* µ -1)/8}


Grade:12

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