Question

If the refractive index of ice is 1.31what is the critical angle for ice surface

Answer 1

Answer:

49.7º

Explanation:

Critical Angle(C) and Refractive Index(η) of the denser medium w.r.t the rarer medium are related as sin(C) = 1/η

Refrective Index of ice is given as η = 1.31

⇒ sin(C) = 1/1.31

⇒ sin(C) = 0.763(approx)

⇒ C = sin⁻¹(0.763)

⇒ C = 49.7º