Question

what is photoelectric effect?​

Answer 1

The photoelectric effect is the emission of electrons or other free carriers when light falls on a material.

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Answer 2

The photoelectric effect is a phenomenon in physics. The effect is based on the idea that electromagnetic radiation is made of a series of particles called photons. When a photon hits an electron on a metal surface, the electron can be emitted. The emitted electrons are called photoelectrons.
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