Definitions for quantum theory
Random House Webster's College Dictionary
a theory for predicting the discrete energy states of atoms and of radiation.
any theory that describes a force or field using the methods of quantum mechanics:
a quantum theory of gravitation.
Origin of quantum theory:
(physics) a physical theory that certain properties occur only in discrete amounts (quanta)
A theory developed in early 20th century, according to which nuclear and radiation phenomena can be explained by assuming that energy only occurs in discrete amounts called quanta. In current usage quantum theory may refer to any or all of the following, depending on the context:
U.S. National Library of Medicine
The theory that the radiation and absorption of energy take place in definite quantities called quanta (E) which vary in size and are defined by the equation E=hv in which h is Planck's constant and v is the frequency of the radiation.
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