1.

Light of a certain wavelength has a wave number `barv` in vacum. Its wave number in a medium of refractive index n isA. `n/v`B. `(1)/(n barv)`C. `(barv)/(n)`D. `n barv`

Answer» Correct Answer - D
`n barv`
`bar(lamda_(a))=barv,barlamda_(m)= ?, mu =n`
`m =(lamda_(a))/(lamda_(m))=(bar(lamda_(m)))/(lamda_(m))=(bar(lamda_(m)))/(barv)`
`bar(lamda_(m)) =m barv`
`= n barv. `


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