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15.
The speed of the light in a diamond is 1,24,000 km/s. Find the retractive
index of diamond if the speed of light in air is 3,00,000 km/s.
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Answer:
➡️speed of light in air(n1) = 300000km/s
➡️speed of light in diamond(n) = 124000km/s
refractive index of diamond = n1/n
that is, 300000/124000
= 300/124 = 2.42
hence, refractive index of diamond is 2.42
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