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A wavelength of a monochromatic light in...

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

A

`1:mu`

B

`mu:1`

C

`1:1`

D

`mu^2:1`

Text Solution

Verified by Experts

The correct Answer is:
A, B
`mu=c/v=(lambda_0f)/(lambdaf)`
`(mu)/(1)=(lambda_0)/(lambda)`
`therefore lambda_0 : lambda=mu : 1`
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