A dye absorbs a photon of wavelength `lambda` and re-emits the same energy into two photons of wavelengths `lambda_1` and `lambda_2` respectively. The wavelength `lambda` is related with `lambda_1` and `lambda_2` as:

Options

A. `lambda=(lambda_1+lambda_2)/(lambda_1 lambda_2)`
B. `lambda=(lambda_1 lambda_2)/(lambda_1+lambda_2)`
C. `lambda=((lambda_1)^2 (lambda_2)^2)/(lambda_1+lambda_2)`
D. `lambda=(lambda_1 lambda_2)/(lambda_1+lambda_2)^2`

Answer

B