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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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
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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]
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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.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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)
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations

uncertainty principle

n (Phys) → Unbestimmtheits- or Ungenauigkeits- or Unschärferelation f
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References in periodicals archive ?
This limit is expressed by the Heisenberg uncertainty relation, which states that it is impossible to simultaneously predict, for example, the measurements of a particle's position and momentum, or of two components of a spin, with arbitrary precision.
According to the uncertainty relation [DELTA]p [greater than or equal to] h/[DELTA]x and the lower limit of tunneling particle energy [30, 31] [omega] [greater than or equal to] h/[DELTA]x, near the event horizon, the uncertainty of the position can be taken as the radius of the black hole [30, 31]; that is, [DELTA]x [approximately equal to] [r.sub.BH] = [r.sub.+].
[4] Masanao Ozawa, Physical content of Heisenberg's uncertainty relation: limitation and reformulation, Physics Letters A 318 (2003), 21-29
This is the WVD; hence we obtain a new uncertainty relation for the WVD.
We also show the so-called uncertainty relation between the band-width and the second moment of the square of the interferogram.
Table 4 reports results from Granger-causality tests of the inflation-inflation uncertainty relation with lags of four, eight, and 12 months.
"The Heisenberg uncertainty relation has nothing to do with wave-particle duality."
Brau, "Minimal length uncertainty relation and the hydrogen atom," Journal of Physics A: Mathematical and General, vol.
of the resulting Uncertainty relation (see for example [8] and [9, pp.