A ray of light is incident on 'a plane mirror at an angle of 20°....
PHYSICS
WAEC 1999
A ray of light is incident on 'a plane mirror at an angle of 20°. This mirror is rotated through, twice this angle, In this new position the angle between the incident ray and the reflected ray is
- A. 20°
- B. 40°
- C. 80°
- D. 120°
Correct Answer: B. 40°
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