A laser beam strikes a plane mirror's reflecting surface with an angle of incidence of $$43 ^ { \circ } .$$ What is the angle between the incident ray and the reflected ray?
A) $45 ^ { \circ }$
B) $86 ^ { \circ }$
C) $90 ^ { \circ }$
D) $0 ^ { \circ }$
E) $43 ^ { \circ }$

Question

A laser beam strikes a plane mirror's reflecting surface with an angle of incidence of $$43 ^ { \circ } .$$ What is the angle between the incident ray and the reflected ray? 
A) $45 ^ { \circ }$
B) $86 ^ { \circ }$
C) $90 ^ { \circ }$
D) $0 ^ { \circ }$
E) $43 ^ { \circ }$

Quizplus · Accepted Answer

The angle between the incident ray and the reflected ray is twice the angle of incidence because the angle of reflection equals the angle of incidence. Therefore, $2 \times 43 ^ { \circ } = 86 ^ { \circ }$.

A Laser Beam Strikes a Plane Mirror's Reflecting Surface with an Angle