Q.

The wavelength of sodium light in air is 5890A0. The velocity of light in air is 3×108 ms−1. The wavelength of light in a glass of refractive index 1.6, would be close to

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a

5890A0

b

3680A0

c

9424A0

d

15078A0

answer is B.

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Detailed Solution

Frequency does not depend on mediumμ1μ2=V2V1=λ2fλ1f⇒ μ2λ2=λ1μ1​⇒μ2=58901.6=3681.25A0
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