Question 26
Light and ReflectionWhen a plane mirror at which a ray is incident is rotated through an angle θ, the reflected ray will be rotated through
- A.½θ
- B.θ
- C.2θ
- D.3θ.
Show the answer and explanation
Answer: C (2θ)
Explanation
Turning the mirror by θ turns the normal by θ, which changes both the angle of incidence and of reflection by θ, so the reflected ray turns through 2θ.