🌐EnglishEnglishDeutschItalianoРусский日本語EntityQ1664011· pop 6· linked from 17 articlesinternal conversiontransition from a higher to a lower electronic state in a molecule or atomAvailable in 6 languagesDeutsch日本語РусскийItalianoUkrainianvia Wikidata sitelinks · CC0ConnectionsphotonEntitydigital object identifierEntityCategoriesFluorescencePhotochemistrySpectroscopy