Question

Consider scattering of light by atoms with a single strong resonance at the wavelength of 800 nm. The atoms can be described by the simples Lorentz model. The atoms are illuminated with light with constant polarization and the irradiance of the scattered light is measured at a certain constant direction. Calculate the ratio of the intensities of scattered light for the wavelengths of 850 nm and 500 nm.

Answer 1

As per the Rayleigh Criterion, the intensity of scattered light is inversely proportional to the fourth power of the wavelength of a particular light so

and

From the above two equations