Question

Two plane mirrors are placed perpendicular to each other. A ray strikes one mirror and after reflection from the second mirror will be

• A. perpendicular to the original ray
• B. parallel to the original ray
• C. at $45^{\circ }$ to the original ray
• D. can be at any angle to the original ray

Answer 1

Answer: (B)

Ray after reflections from two perpendicular mirrors are always parallel to incident ray irrespective of angle of incidence.