Light enter from air to diamond which has a refractive index of2.42.calculate the speed of light in diamond.the speed of light in air is 3×10 to the power 8 m/s.
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Refrective index of diamond = c / v
》2.42 = 3 × 10^8 / v
》v = 3 × 10^8 / 2.42
》v = 1.23 m/s
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