A slab of material 1 rests on the surface of a slab of material 2 . A light ray in material 1 has an angle of incidence of 30° on the interface between the materials, while the ray in material 2 has an angle of refraction of 45°. What is the critical angle of incidence for total internal reflection for a ray of light going from material 2 to material 1?
a. 30°
b. 45°
c. In this case there is no critical angle.
d. At least one of the indices of refraction or its equivalent is needed to solve this problem.
b
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