Physicshard · Past Paper
If the speed of light in medium A is 2x10^8 m/s and in medium B is 2.5x10^8 m/s, the refractive index of A with respect to B is:
A0.8
B1.25
C1.5
D0.75
✓ Correct Answer: B — 1.25
nAB = vB / vA = 2.5/2.0 = 1.25.
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