Q

Light enters a medium of refractive index 1.33 from air. What is its speed in the medium?

RRB JE; RRB Group-D; RRB SSE 17/12/2024 / Shift-II; 26/08/2022 / Shift-III; 21/12/2014 2024; 2022; 2014
✓ Answer: C 2.26 × 10^8 m/s
v = c/n = 3 × 10^8/1.33 ≈ 2.26 × 10^8 m/s.
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