A light ray is traveling in a diamond (n = 2.419).If the ray approaches the diamond-air interface,what is the minimum angle of incidence that will result in all of the light reflected back into the diamond? The index of refraction for air is 1.000.
A)24.42°
B)32.46°
C)54.25°
D)65.58°
E)77.54°

Question

Quizplus · Accepted Answer

The minimum angle of incidence for total internal reflection is the critical angle, calculated using Snell's Law: sin(θc) = n2/n1. For diamond to air, sin(θc) = 1/2.419, giving θc ≈ 24.42°.

A Light Ray Is Traveling in a Diamond (N =