Kapitsa–Dirac effect
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The Kapitza–Dirac effect is a quantum mechanical effect consisting of the diffraction of matter by a standing wave of light.[1][2] The effect was first predicted as the diffraction of electrons from a standing wave of light by Paul Dirac and Pyotr Kapitsa (or Peter Kapitza) in 1933.[3] The effect relies on the wave–particle duality of matter as stated by the de Broglie hypothesis in 1924.