Question 11
Light and ReflectionA ray of light strikes a plane mirror at an angle of incidence of 35°. If the mirror is rotated through 10°, through what angle is the reflected ray rotated?
- A.70°
- B.45°
- C.25°
- D.20°
Show the answer and explanation
Answer: D (20°)
Explanation
When a plane mirror turns through an angle θ, the reflected ray turns through 2θ, so 2 × 10° = 20°.