Physicshard · Past Paper
A ray of light falls on a glass surface at an angle of 30 degrees with the surface. If it is reflected, what is the angle between incident and reflected ray?
A60 degrees
B120 degrees
C30 degrees
D90 degrees
✓ Correct Answer: B — 120 degrees
Angle with normal = 90-30=60. Angle of reflection = 60. Total angle = 60+60 = 120.
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