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  1. Dictionary
    Un·cer·tain·ty prin·ci·ple
    /ˌənˈsərtntē ˈprinsəpəl/

    noun

    • 1. the principle that the momentum and position of a particle cannot both be precisely determined at the same time.

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  3. en.wikipedia.org › wiki › Uncertainty_principleUncertainty principle - Wikipedia

    The uncertainty principle, also known as Heisenberg's indeterminacy principle, is a fundamental concept in quantum mechanics. It states that there is a limit to the precision with which certain pairs of physical properties, such as position and momentum, can be simultaneously known.

  4. www.britannica.com › science › uncertainty-principleUncertainty principle | Definition & Equation | Britannica

    Mar 29, 2024 · Learn about the uncertainty principle, a fundamental concept of quantum mechanics that limits the precision of measuring position and velocity of a particle. Find out how it arises from the wave-particle duality and how it applies to other pairs of observables.

    • The Editors of Encyclopaedia Britannica

  5. scienceexchange.caltech.edu › topics › quantumWhat Is the Uncertainty Principle? Heisenberg Uncertainty ...

    The uncertainty principle states that we cannot know both the position and speed of a particle with perfect accuracy. Learn how this principle applies to quantum, classical and mathematical problems, and see analogies with waves and rollercoasters.

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  6. plato.stanford.edu › entries › qt-uncertaintyThe Uncertainty Principle - Stanford Encyclopedia of Philosophy

    Oct 8, 2001 · The uncertainty principle is certainly one of the most famous aspects of quantum mechanics. It has often been regarded as the most distinctive feature in which quantum mechanics differs from classical theories of the physical world.

    • Jan Hilgevoord, Jos Uffink
    • 2001

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  8. phys.libretexts.org › Bookshelves › University7.3: The Heisenberg Uncertainty Principle - Physics LibreTexts

    Sep 12, 2022 · Heisenberg’s uncertainty principle is a key principle in quantum mechanics. Very roughly, it states that if we know everything about where a particle is located (the uncertainty of position is small), we know nothing about its momentum (the uncertainty of momentum is large), and vice versa.

  9. hyperphysics.phy-astr.gsu.edu › hbase › uncerThe Uncertainty Principle - HyperPhysics

    The Uncertainty Principle. The position and momentum of a particle cannot be simultaneously measured with arbitrarily high precision. There is a minimum for the product of the uncertainties of these two measurements. There is likewise a minimum for the product of the uncertainties of the energy and time.

  10. chem.libretexts.org › Bookshelves › Physical_andHeisenberg's Uncertainty Principle - Chemistry LibreTexts

    Jan 30, 2023 · Heisenberg’s Uncertainty Principle is one of the most celebrated results of quantum mechanics and states that one (often, but not always) cannot know all things about a particle (as it is defined by it’s wave function) at the same time. This principle is mathematically manifested as non-commuting operators.

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