- fine-structure constant
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The fundamental physical value α, presumed to be constant, that characterizes the strength of the electromagnetic force.
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fine-structure constant
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Fine-structure constant — The fine structure constant or Sommerfeld fine structure constant, usually denoted alpha ,, is the fundamental physical constant characterizing the strength of the electromagnetic interaction.It is a dimensionless quantity, and thus its numerical … Wikipedia
fine structure constant — smulkiosios sandaros konstanta statusas T sritis Standartizacija ir metrologija apibrėžtis Apibrėžtį žr. priede. priedas( ai) Grafinis formatas atitikmenys: angl. fine structure constant vok. Feinstrukturkonstante, f rus. константа тонкой… … Penkiakalbis aiškinamasis metrologijos terminų žodynas
fine structure constant — smulkiosios sandaros konstanta statusas T sritis fizika atitikmenys: angl. fine structure constant vok. Feinstrukturkonstante, f rus. постоянная тонкой структуры, f pranc. constante de la structure fine, f … Fizikos terminų žodynas
fine-structure constant — A dimensionless constant, equal to 7.297351 x 10 3 (approximately 1/137), given by 2π times the square of the electron charge, divided by the product of the speed of light and Planck s constant … Dictionary of automotive terms
fine-structure constant — ¦ ̷ ̷ ˈ ̷ ̷ ̷ ̷ noun : a dimensionless constant that is a measure of the strength of electromagnetic interactions of subatomic particles and that has an approximate value of 0.0073 or 1/137 symbol α … Useful english dictionary
fine structure — /fuyn/, Physics. a group of lines that are observed in the spectra of certain elements, as hydrogen, and that are caused by various couplings of the azimuthal quantum number and the angular momentum quantum number. Cf. hyperfine structure. [1915… … Universalium
Fine structure — Interference fringes, showing fine structure (splitting) of a cooled deuterium source, viewed through a Fabry Pérot étalon. In atomic physics, the fine structure describes the splitting of the spectral lines of atoms due to first order… … Wikipedia
Dimensionless physical constant — In physics, a dimensionless physical constant (sometimes fundamental physical constant) is a universal physical constant that is dimensionless having no unit attached, so its numerical value is the same under all possible systems of units. The… … Wikipedia
Constante de structure fine — En physique, la constante de structure fine, représentée par la lettre grecque α, est une constante fondamentale qui régit la force électromagnétique assurant la cohérence des atomes et des molécules. Elle fut proposée en 1916 par le physicien… … Wikipédia en Français
Constante De Structure Fine — Cet article fait partie de la série Mécanique quantique Postulats de la mécanique quantique Histo … Wikipédia en Français
