Question

What is photoelectric effect?

Answer 1

The photoelectric effect refers to the emission, or ejection, of electrons from the surface of, generally, a metal in response to incident light. When a photon hits an electron on a metal surface, the electron can be emitted. The emitted electrons are called photoelectrons.

Answer 2

When radiation with frequency greater than a certain minimum frequency$(v_{0})$ strike the surface of a metal, electrons are ejected. This minimum energy $(hv_{0})$ is called work function $(W_{0})$ and this phenomenon is known as Photoelectric effect.