Question

A ray OP of monochromatic light is incident
on the face AB of prism ABCD near vertex B
at an incident angle of 60°. If the refractive
index of the material of the prism isv3,
which of the following is (are) correct?

A)The ray gets totally internally reflected at face
B)The ray comes out through face AD
C)The angle between the incident ra
mergent ray is 90°
D) All the above​

Answer 1

If the refractive  index of the material of the prism is v3 then the angle between the incident ray and emergent ray is 90°.

Option (C) is correct.

Explanation:

If the refractive  index of the material of the prism is v3 then the angle between the incident ray and emergent ray is 90°.

Using Snell's law we get

Sin^-1 1 / √3 < Sin^-1 1 /√2

Net deviation is 90°

Thus the angle is 90°

When the ray strike the glass surface at an angle of 45° , it bends towards the normal.