What is meant by photoelectric effect? Where is photoelectric effect used?

PHOTOELECTRIC EFFECT:

The peculiarity by which electrons are emitted from certain metal surface, when sufficiently high frequency electromagnetic radiations are allowed to incident on it.

Whenever a unit of light called a photon hits the material it can create a photoelectron in the material which can be distinguished as an electric current flow.

The photoelectric effect involves, irradiating  a metal surface with photons of sufficiently high energy to eject the electrons  from the metal.

The photoelectric effect occurs with photons having energies from a few electronvolt to  over 1MeV

Where is photoelectric effect used?

The photoelectric effect phenomena (convert light into electricity)  used to adjust the automatic Iris in various types of cameras,and; in solar cells.

The concept of wave-particle duality was developed because of the photoelectric effect.