Photoelectric effect is an inelastic collision. give reason?
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The photoelectric effect supports a particle theory of light in that it behaves like an elastic collision (one that conserves mechanical energy) between two particles, the photon of light and the electron of the metal. ... However much hν exceeds the binding energy will be the kinetic energy KE of the ejected electron.A
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Collision is classified as inelastic, if total kinetic energy before collision and the total kinetic energy after collision are not same, i.e., total kinetic energy is not conserved.
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