Physicsmedium · Past Paper
The refractive index of a medium is 1.5. The speed of light in that medium is:
A2 x 10^8 m/s
B3 x 10^8 m/s
C1.5 x 10^8 m/s
D4.5 x 10^8 m/s
✓ Correct Answer: A — 2 x 10^8 m/s
v = c/n = (3x10^8)/1.5 = 2x10^8 m/s.
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