The photoelectric effect occurs when photoelectrons are ejected from a metal surface in response to monochromatic radiation incident on the surface. It has three characteristics: (1) it is instantaneous, (2) it occurs only when the radiation is above a cut-off frequency, and (3) kinetic energies of photoelectrons at the surface do not depend of the intensity of radiation. The photoelectric effect cannot be explained by classical theory.

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Photoelectric effect occurs when a light with sufficient energy is shined on the surface of a metal and ejects electrons from the atom.

The idea of Newton that light is a stream of light particles was thoroughly refuted by Young and Fresnel followed by Maxwell in the 19th century, but then surprisingly reappeared in the beginning of the 20th century in the work by Planck on blackbody radiation followed by Einstein's formula for the photoelectric effect presented in his 1905 article On a Heuristic Viewpoint Concerning the Production and Transformation of Light: P + W = E with E = h f , where P is the kinetic energy of an…

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IIT-JEE GAMING on Instagram: “photoelectric effect, a phenomenon in which electrically charged particles are released from or within a material when it absorbs…”