Physicshard · Past Paper
The refractive index of a medium is 1.732. What is the angle of refraction if the angle of incidence is 60 degrees?
A30 degrees
B45 degrees
C60 degrees
D90 degrees
✓ Correct Answer: A — 30 degrees
sin(r) = sin(60) / 1.732 = (0.866) / 1.732 = 0.5. So r = 30 degrees.
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