PHYSICS · Single correct · AP · Physics 2: Algebra-based · Geometric Optics · Geometric Optics
Problem
Two parallel plane mirrors face each other. A laser beam strikes mirror M1 at an angle of 35° relative to the normal, reflects to mirror M2, and after that second reflection emerges from the mirror system. Which of the following best describes the direction of the emergent beam compared with the direction of the original incident beam?
(a) It is parallel to but opposite in direction to the incident beam.
(b) It is parallel to and in the same direction as the incident beam.
(c) It deviates from the incident beam by 70∘ toward the normal of M1.},{
(d) It deviates from the incident beam by 35∘ toward the normal of M2.