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quantum mechanics

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A system of mechanics that was developed from quantum theory and is used to explain the properties of atoms and molecules. Using the energy quantum as a starting point it incorporates Heisenberg's uncertainty principle and the de Broglie wavelength to establish the wave-particle duality on which Schrödinger's equation is based. This form of quantum mechanics is called wave mechanics. An alternative but equivalent formalism, matrix mechanics, is based on mathematical operators.

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