Question

Green light of wavelength 5460Å is incident on an air glass interface. If the refractive index of glass is 1.5, the wavelength of light in glass would be `(C=3 xx 10^(8) ms^(-1))`n
A. `3640Å`
B. `5460Å`
C. `4861Å`
D. `6240Å`

Answer 1

Correct Answer - A
`n=(v_a)/(v_m)=(lambda_a)/(lambda_m) :. lambda_(m)=(lambda_a)/(n)=(5460)/(1.5)=3640Å`