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
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 — /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
dédoublement de la structure fine — smulkiosios sandaros suskilimas statusas T sritis fizika atitikmenys: angl. fine structure splitting vok. Feinstrukturaufspaltung, f rus. расщепление тонкой структуры, n pranc. dédoublement de la structure fine, m … Fizikos terminų žodynas
Hyperfine structure — In atomic physics, hyperfine coupling is the weak magnetic interaction between electrons and nuclei. Hyperfine coupling causes the hyperfine splitting of atomic or molecular energy levels. The totality of energy levels spawned by hyperfine… … Wikipedia
hyperfine structure — /huy peuhr fuyn , huy /, Physics. the splitting of the lines of an atomic spectrum, produced by the angular momentum of the nucleus of the atom. Cf. fine structure. [1925 30; HYPER + FINE1] * * * ▪ physics in spectroscopy, the splitting of… … Universalium
Electron — For other uses, see Electron (disambiguation). Electron Experiments with a Crookes tube first demonstrated the particle nature of electrons. In this illustration, the profile of the cross shaped target is projected against the tube face at right… … Wikipedia
Electron affinity (data page) — Elements = Molecules References Many of the links to the full text of articles (linked from article titles) require subscription to the journal or payment. The links to abstracts are usually free of charge. *Andersen, H.H.; Petrunin, V.V.;… … Wikipedia
Zeeman effect — The Zeeman effect ( /ˈzeɪm … Wikipedia
Energy level — A quantum mechanical system or particle that is bound that is, confined spatially can only take on certain discrete values of energy. This contrasts with classical particles, which can have any energy. These discrete values are called energy… … Wikipedia