question_answer

A glass block of refractive index \[\mu =1.5\] has an L cross-section with both arms identical. A light ray enters the block from left at an angle of incidence of\[45{}^\circ \], as shown in the figure. If the block was absent, the ray would pass through the point P. Calculate the angle at which the ray will emerge from the bottom face after refraction through the block.

A) \[75{}^\circ \]                   

B) \[60{}^\circ \]                   

C) \[30{}^\circ \]                   

D) \[45{}^\circ \]

Correct Answer: D

Solution :

[d] The path of the light ray is as shown.