Green light of wavelength 5460 Å is incident on an air and glass interface. If refractive index of glass is 1.5, then wavelength of light in glass would be .....

Options

A. 5460 Å
B. 4860 Å
C. 3640 Å
D. 2100 Å

Answer

C, D

Explanation

`n=(lambda)/(lambda.),` `c=3xx10`,
`lambda`=wavelength in air = `5460^@`,
`lambda.`=wavelength in medium n=1.5
`therefore lambda.=(lambda)/(n)=(5460)/(1.5)=3640` Å