The refractive index of a liquid is 1.5. If the velocity ...
The refractive index of a liquid is 1.5. If the velocity of light in vacuum is 3.0 x 108ms−1, the velocity of light in the liquid is
1.5 x 108ms−1
2.0 x 108ms−1
3.0 x 108ms−1
4.5 x 108ms−1
Correct answer is B
n = speed in airspeed in glass
1.5 = 3×104speed in glass
Speed in glass = 3 x 108m/s / 1.5
= 2 x 108m/s
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