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Light of certain colour has 2000 waves p...

Light of certain colour has 2000 waves per millimetre in air . What will be the wavelength of this light in a medium of refractive index 1.25 ?

A

`1000Å`

B

`2000Å`

C

`3000Å`

D

`4000Å`

Text Solution

Verified by Experts

The correct Answer is:
D
`lambda_("air")=(1mm)/(2000)=5xx10^(-7) m =5000Å`
`lambda_("medium")=(lambda_("air"))/(mu)=(5000Å)/(1.25)=4000Å`
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