(i) Calculate the value of 0, for which light incident normally on face AB grazes along the face BC. μg = 3/2 μw = 4/3.
(ii) Draw a graph showing the variation of angle of deviation 'δ' with that of angle of incidence 'i' for a monochromatic ray of light passing through a glass prism of refracting angle A. What do you interpret from the graph? Write a relation showing the dependence of angle of deviation on angle of incidence and hence derive the expression for refractive index of the prism.
