🌐EnglishEnglishDeutschEspañolFrançaisItalianoPolskiPortuguêsРусскийالعربية한국어中文日本語EntityQ932483· pop 18· linked from 267 articlesforbidden mechanismspectral line associated with absorption or emission of light by atomic nuclei, atoms, or moleculesConnectionsatomic nucleusEntityspectroscopyEntityCategoriesAstronomical spectroscopyNuclear physicsQuantum chemistrySpectroscopy