A parallel beam of light strikes a piece of transparent glass having cross-section as shown in the f

Question

A parallel beam of light strikes a piece of transparent glass having cross-section as shown in the figure below. Correct shape of the emergent wavefront will be (Figures are schematic and not drawn to scale.)\

Professor PC Thomas Classes · Answer

(a)  Since the upper and lower part of the wavefront has to travel a larger distance through glass, the emerging wavefront will be similar to that given in option (a).\