Question

Every metal has a difinite work function. Why do not two photoelectrons come out with the same energy even if the incident energy is monochromatic?​

Answer 1

Explanation:

The minimum amount of energy required to eject the electron is called the work function.

The energy depends upon the level of the conduction band. Every electron has its own energy levels depending upon the conduction band. When incident energy is monochromatic the electrons come out from different bands have different energy levels.

Some electrons may also collide with the other and there may be a loss of some kinetic energy. Thus all photoelectrons do not have the same energy.