question_answer

A ray of light is incident at an angle of \[{{60}^{o}}\] on one face of a prism of angle \[{{30}^{o}}\]. The ray emerging out of the prism makes an angle of \[{{30}^{o}}\] with the incident ray The emergent ray is

A)  Normal to the face through which it emerges

B)  Inclined at \[{{30}^{o}}\] to the face through which it emerges

C)  Inclined at \[{{60}^{o}}\] to the face through which it emerges

D)  Inclined at \[{{90}^{o}}\] to the normal at face through which it emerges