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Monochromatic light is refracted from ai...

Monochromatic light is refracted from air into the glass of refractive index `mu` . The ratio of the wavelength of incident and refracted waves is

A

`1 : mu^(2)`

B

`1: mu^(2)`

C

`mu: 1`

D

`1:1`

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The correct Answer is:
C
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