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Quantum Theory

Quantum theory grew out of a series of anomalies in the picture of matter and light offered by Newtonian physics - in particular associated with black-body radiation, the photo-electric effect, and the need to devise a model of the atom consistent with the newly discovered subatomic particles.

Important principles of quantum theory include its statistical nature, and the uncertainty principle which sets a limit on our knowledge of physical systems. The implications of the theory for the nature of reality are much discussed (see Implications of the new physics). Most quantum theorists accept an intrinsic element of probability in fundamental physics, and also the need to see systems as wholes rather than merely dissecting them into their simplest components.

Contributed by: Dr. Christopher Southgate

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