uncertainty principle


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uncertainty principle

n.
A principle in quantum mechanics holding that greater accuracy of measurement for one observable quantity entails less accuracy of measurement for another conjugate quantity.

uncertainty principle

n
(General Physics) the principle that energy and time or position and momentum of a quantum mechanical system, cannot both be accurately measured simultaneously. The product of their uncertainties is always greater than or of the order of h, where h is the Planck constant. Also known as: Heisenberg uncertainty principle or indeterminacy principle

uncer′tainty prin`ciple


n.
the quantum-mechanical principle, formulated by Heisenberg, that measuring either of two related quantities, as position and momentum or energy and time, produces uncertainty in measurement of the other.
[1930–35]

un·cer·tain·ty principle

(ŭn-sûr′tn-tē)
A principle in quantum mechanics stating that it is impossible to measure both the position and the momentum of very small particles (such as electrons) at the same time with accuracy. According to this principle, the more accurately the position of a small particle is known, the less accurately its mass and velocity can be known, and the more accurately its mass and velocity are known, the less accurately its position can be known. The uncertainty principle and the theory of relativity form the basis of modern physics.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.uncertainty principle - (quantum theory) the theory that it is impossible to measure both energy and time (or position and momentum) completely accurately at the same time
scientific theory - a theory that explains scientific observations; "scientific theories must be falsifiable"
quantum theory - (physics) a physical theory that certain properties occur only in discrete amounts (quanta)
Translations

uncertainty principle

n (Phys) → Unbestimmtheits- or Ungenauigkeits- or Unschärferelation f
References in periodicals archive ?
Gosson (University of Vienna) proposes new concepts from symplectic topology as the proper setup for a better understanding of the twilight zone between quantum and classical properties, and shows how symplectic geometry and its topological extensions allow physicists to state and prove a classical multi-dimensional uncertainty principle formally similar to the quantum uncertainty relations.
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In this paper we investigate the connection between the possibility of a hidden variable in time and the uncertainty principle.
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In quantum mechanics, the uncertainty principle refers to the position and momentum of a particle cannot be determined simultaneously, the uncertainty of position ([DELTA]x) and uncertainty of momentum ([DELTA]p) obey the following inequality
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Further on comes the Heisenberg Uncertainty Principle, which Susskind is able to explain thanks to the preceding foundation, rather than just stating it, as most popular books do.
Because it's also referred to as the uncertainty principle, it's often mistakenly thought to mean that, even in quan- tum mechanics, you can't be certain of anything.
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