🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTürkçeРусскийالعربيةفارسی한국어中文日本語EntityQ631614· pop 26· linked from 108 articlesLamb shiftdifference in energy of hydrogenic atom electron states not predicted by the Dirac equationWikidata factsImageHydrogen fine structure2.svgSources (2)wikidata.orgdocs.openalex.orgvia Wikidata · CC0Available in 24 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةBahasa IndonesiaBanglaConnectionselectric potentialEntitytauEntityCategoriesPhysical quantitiesQuantum electrodynamics