What is the angle of incidence on an air-to-glass boundary if the angle of refraction in the glass (n = 1.60)is 25°?
A) 40°
B) 25°
C) 43°
D) 16°

Question

Quizplus · Accepted Answer

The angle of incidence can be calculated using the Snell's law, which states that the ratio of the sines of the angles of incidence and refraction is equal to the ratio of the refractive indices of the two media:
sin(angle of incidence)/sin(25°) = 1/1.60
sin(angle of incidence) = sin(25°)/1.60
angle of incidence = arcsin(sin(25°)/1.60) ≈ 43°. Therefore, the best answer choice is C.

What Is the Angle of Incidence on an Air-To-Glass Boundary