Most of the literaure discusses the Photoelectric Effect in mocochromatic light. The only information I could get on polychromatic light is : https://arxiv.org/pdf/0904.1283.pdf
However, the specific quetions I am interested in are:
Given a mixed polychromatic light of $n$ wavelengths $\lambda_n$ , falling upon a target with threschhold wavelength $\lambda_t > max(\lambda_n)$, will we be possibly able to detect electrons that correspond to a particular wavelength appart from all others?
And since every wavelength in the mixed light cause emission, will we be able to detect the intensity as well ? Specifically, since highe intensity means larger number of photons, and thus larger number of collisions, will we be able to detect the intensity in this way?
Ignore the effect of depth of target, and asume uniform illumination.