Question

In an experiment, light of a particular wavelength is incident on a melal surface, and electrons are emitted from the surface as a result. To produce more electrone per unit time but with less kinetic energy per electron, the experimenter should do which of the following?​

Answer 1

The K of each photoelectron is given by. K = hf – ϕ. To reduce the energy of each photon, we need less f (which means more λ) for the incoming light. Since intensity is directly related to the number of photoelectrons emitted we want to increase the intensity.

So the experiment would Increase the intensity and the wavelength of the light