Q

The refractive index of diamond is 2.42. What is the speed of light in diamond?

RRB Group-D 06/10/2022 / Shift-III 2022
✓ Answer: B 1.24 × 10^8 m/s
v = c/n = 3 × 10^8/2.42 ≈ 1.24 × 10^8 m/s.
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