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  2. Pauli exclusion principle - Wikipedia

    en.wikipedia.org/wiki/Pauli_exclusion_principle

    For example, if two electrons reside in the same orbital, then their values of n, ℓ, and m ℓ are equal. In that case, the two values of m s (spin) pair must be different. Since the only two possible values for the spin projection m s are +1/2 and −1/2, it follows that one electron must have m s = +1/2 and one m s = −1/2.

  3. Antisymmetrizer - Wikipedia

    en.wikipedia.org/wiki/Antisymmetrizer

    Consider a wave function depending on the space and spin coordinates of N fermions: (,, …,) (,),where the position vector r i of particle i is a vector in and σ i takes on 2s+1 values, where s is the half-integral intrinsic spin of the fermion.

  4. Pockels effect - Wikipedia

    en.wikipedia.org/wiki/Pockels_effect

    For an example, the halfwave voltage is approximately 7.6 kV for a KDP crystal with a n o = 1.51, r 63 = 10.6X10-12 m/V at λ 0, and Δφ = π. [4] The advantage of using longitudinal Pockels cells is that the voltage requirements for quarter wave or half wave retardance is not dependent on crystal length or diameter.

  5. Fermion - Wikipedia

    en.wikipedia.org/wiki/Fermion

    All subatomic particles must be one or the other. A composite particle may fall into either class depending on its composition. In particle physics, a fermion is a subatomic particle that follows Fermi–Dirac statistics. Fermions have a half-odd-integer spin (spin ⁠ 1 / 2 ⁠, spin ⁠ 3 / 2 ⁠, etc.) and obey the Pauli exclusion principle.

  6. Full width at half maximum - Wikipedia

    en.wikipedia.org/wiki/Full_width_at_half_maximum

    Full width at half maximum. In a distribution, full width at half maximum (FWHM) is the difference between the two values of the independent variable at which the dependent variable is equal to half of its maximum value. In other words, it is the width of a spectrum curve measured between those points on the y-axis which are half the maximum ...

  7. Glossary of chemistry terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chemistry_terms

    Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...

  8. Hidden-variable theory - Wikipedia

    en.wikipedia.org/wiki/Hidden-variable_theory

    Also, the slit passed through is not random but is governed by the (hidden) pilot wave, resulting in the wave pattern that is observed. In Bohm's interpretation, the (non-local) quantum potential constitutes an implicate (hidden) order which organizes a particle, and which may itself be the result of yet a further implicate order: a ...

  9. Observer (quantum physics) - Wikipedia

    en.wikipedia.org/wiki/Observer_(quantum_physics)

    The theoretical foundation of the concept of measurement in quantum mechanics is a contentious issue deeply connected to the many interpretations of quantum mechanics.A key focus point is that of wave function collapse, for which several popular interpretations assert that measurement causes a discontinuous change into an eigenstate of the operator associated with the quantity that was ...