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A ray of light passes through a prism in principal plane; the deviation being equal to angle of incidence which is equal to 2α. It is given that α is angle of prism and µ is refractive index of material of prism, then cos α = ?

A ray of light passes through a prism in principal plane; the deviation being equal to angle of incidence which is equal to 2α. It is given that α is angle of prism and µ is refractive index of material of prism, then cosα = ?

Grade:12

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