Total internal reflection can occur when a light ray moves across a boundary between different materials in which direction?
A) Parallel to the surface, but only if the ray is polarized
B) Exactly perpendicular to the surface, no matter what the indices of refraction
C) From the material with the faster speed of light, into the material with the slower speed of light
D) From a material with a slower speed of light to a material with a faster speed of light

Question

Quizplus · Accepted Answer

Total internal reflection occurs when a light ray moves from a material with a higher index of refraction (slower speed of light) to a material with a lower index of refraction (faster speed of light) and the angle of incidence is greater than the critical angle.

Total Internal Reflection Can Occur When a Light Ray Moves