Q

What is the speed of light in a medium with refractive index 1.5?

RRB Group-D 20/09/2018 / Shift-III 2018
✓ Answer: B 2.0 × 10^8 m/s
v = c/n = 3 × 10^8/1.5 = 2 × 10^8 m/s.
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