Physicsmedium · Past Paper
The refractive index of diamond is 2.42. What is the speed of light in diamond?
A1.24 x 10^8 m/s
B3 x 10^8 m/s
C2 x 10^8 m/s
D0.8 x 10^8 m/s
✓ Correct Answer: A — 1.24 x 10^8 m/s
v = c/n = (3 x 10^8) / 2.42 ≈ 1.24 x 10^8 m/s.
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