Quantum-theory meaning

A theory in physics based on the principle that matter and energy have the properties of both particles and waves, created to explain the radiation of energy from a blackbody, the photoelectric effect, and the Bohr theory, and now used to account for a wide range of physical phenomena, including the existence of discrete packets of energy and matter, the uncertainty principle, and the exclusion principle.
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Any of various specific applications of this theory.
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The theory that energy is not absorbed or radiated continuously but discontinuously, and only in multiples of definite, indivisible units (quanta)
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Any of various theories that makes use of the assumptions, principles, and laws of quantum mechanics.
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(physics) A theory developed in the early 20th century, according to which nuclear and radiation phenomena can be explained by assuming that energy only occurs in discrete amounts called quanta.
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(physics) Modern quantum mechanics.
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