A ray in motor oil ( ) strikes a flat oil–water boundary at an angle of to the normal

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Geometric Optics · Geometric Optics

Problem

A ray in motor oil (

n=1.47

) strikes a flat oil–water boundary at an angle of

30^{\circ}

to the normal. Determine whether the angle of refraction in the water (

n=1.33

) will be greater than, equal to, or less than

30^{\circ}

, and briefly state your reasoning.