A equilateral prism of flint glass `(mu_g=3//2)` is placed water `(mu_w=4//3).`
At what angle should a ray of light fall on the face of the prism so that inside the prism the ray is perpendicular to the bisector of the angle of the prism.
Through what angle will the ray turn after passing through both faces of the prism?

Answer

B, C, D

Explanation

(a) Applying Snell's law at D,
`4/3sini=3/2sin30^@`
`:. i=34.2^@`

(b) `delta=delta_D+delta_E=2delta_D`
`=2(i-30^@)`
`=8.4^@`