Energy of photoelectrons emitted from a photosensitive surface is 1.56 ev. If it’s threshold wavelength is2500A find the wavelength of incident light

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?

Which describes increasing the efficiency of energy resource