Question

If a wave hits a smooth surface at an angle of incidence of 40 degrees, the angle of reflection is

A. 0 degrees.
B. 40 degrees.
C. 80 degrees.
D. 90 degrees.

Answer 1

If a wave hits a smooth surface at an angle of incidence of 40 degrees, the angle of reflection is

A. 40 degrees.

B. 0 degrees.

C. 90 degrees.

D. 80 degrees.

THE CORRECT ANSWER IS A

Answer 2

Incidence Angle = Reflection Angle

i = 40°, r = 40°, B.