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]
41.8°
48.2°
60.8°
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°