The wavelength of a monochromatic light ...

The wavelength of a monochromatic light in vacuum is `gamma`. It travels from vacuum to a medium of absolute refractive index `mu`. The ratio of wavelength of the incident and refracted wave is

A

`mu^(2):1`

B

`1:1`

C

`mu:1`

D

`1:mu`

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The correct Answer is:

C

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