Processing math: 62%
Home / Aptitude Tests / Physics / A ray of light incid...

A ray of light incident at an angle θ in a recta...

A ray of light incident at an angle θ in a rectangular prism grazes the surface of the prism on emerging from the prism. Determine the value of the angle. [Absolute refractive index of the material of the prism is 1.5] 

A.

41.8°

B.

48.2°

C.

60.8°

D.

90.0°

Correct answer is A

η=1sinθ

1.5=1sinθ

sinθ=11.5=0.667

\theta = sin^{-1}(0.667) = 41.835°

\approxeq 41.8°