Question

A ray diagram is shown.

A light ray strikes a boundary and a second vector into the second material. The second light ray is closer to the normal.

What does represent?

index of refraction
index of reflection
angle of incidence
angle of refraction

Answer 1

Angle of refraction — it's the angle between the refracted ray (in the second medium) and the normal. The ray bending toward the normal means the refracted angle is smaller.