Задача 40916.

Green tile fotokomnaty manifestation when the film is illuminated by lantern light with a light filter transmitting (lambda = 640nm). What color tile would be and what the max wavelength spectral irradiance density tiles?

Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
If you have any questions about the decision to write. I try to help.