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  2. Complementarity (physics) - Wikipedia

    en.wikipedia.org/wiki/Complementarity_(physics)

    In physics, complementarity is a conceptual aspect of quantum mechanics that Niels Bohr regarded as an essential feature of the theory. [1] [2] The complementarity principle holds that certain pairs of complementary properties cannot all be observed or measured simultaneously. For example, position and momentum or wave and particle properties.

  3. Complementary experiments - Wikipedia

    en.wikipedia.org/wiki/Complementary_experiments

    Scattering experiments are sometimes also called complementary when they investigate the same physical property of a system from two complementary view points in the sense of Bohr. For example, time-resolved and energy-resolved experiments are said to be complementary. [3] The former uses a pulse which is well-defined in time.

  4. Complementarity - Wikipedia

    en.wikipedia.org/wiki/Complementarity

    Complementarity (physics), the principle that objects have complementary properties which cannot all be observed or measured simultaneously; Complementarity theory, a type of mathematical optimization problem; Quark–lepton complementarity, a possible fundamental symmetry between quarks and leptons

  5. Copenhagen interpretation - Wikipedia

    en.wikipedia.org/wiki/Copenhagen_interpretation

    Features common across versions of the Copenhagen interpretation include the idea that quantum mechanics is intrinsically indeterministic, with probabilities calculated using the Born rule, and the principle of complementarity, which states that objects have certain pairs of complementary properties that cannot all be observed or measured ...

  6. Babinet's principle - Wikipedia

    en.wikipedia.org/wiki/Babinet's_principle

    In physics, Babinet's principle [1] states that the diffraction pattern from an opaque body is identical to that from a hole of the same size and shape except for the overall forward beam intensity. It was formulated in the 1800s by French physicist Jacques Babinet .

  7. Uncertainty principle - Wikipedia

    en.wikipedia.org/wiki/Uncertainty_principle

    where = is the reduced Planck constant.. The quintessentially quantum mechanical uncertainty principle comes in many forms other than position–momentum. The energy–time relationship is widely used to relate quantum state lifetime to measured energy widths but its formal derivation is fraught with confusing issues about the nature of time.

  8. Linear complementarity problem - Wikipedia

    en.wikipedia.org/wiki/Linear_complementarity_problem

    Given a real matrix M and vector q, the linear complementarity problem LCP(q, M) seeks vectors z and w which satisfy the following constraints: ,, (that is, each component of these two vectors is non-negative)

  9. Retrocausality - Wikipedia

    en.wikipedia.org/wiki/Retrocausality

    Retrocausality, or backwards causation, is a concept of cause and effect in which an effect precedes its cause in time and so a later event affects an earlier one. [1] [2] In quantum physics, the distinction between cause and effect is not made at the most fundamental level and so time-symmetric systems can be viewed as causal or retrocausal.