A beam of light propagation at an angle ` alpha _1 ` from a medium 1 through to another medium 2 at an angle ` alpha_2` if the wavelength of light in medium 1 is ` lamda _1 ` , then the wavelength of light in medium 2, `( lamda _2)` is

Options

A. `sin alpha_2/sin alpha_1 lambda_1`
B. `sin alpha_1/sin alpha_2 lambda_1`
C. ` (alpha_2/ alpha_1) lambda_1`
D. `lambda_1`

Answer

A

Explanation

Answer(1) `(sinalpha_1)/(sin alpha_2) = mu_2/mu_1 = lambda_1/lambda_2`
`therefore lambda_2 = sinalpha_2/sinalpha_1 lambda_1`