A water film is formed on a glass-block. A light ray is incident on water film from air at an angle of 60 with the normal. The angle of incidence on glass slab is
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It'll incident with the same angle 60 degree with the normal of the glass slab as the angle of incidence on the water surface is equal to the angle of emergence from it .Here the angle of emergence from the water film is also the angle of incidence on the glass block.So your answer is 60 degree.
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