🌐EnglishEnglishDeutschEspañolItalianoPortuguêsРусский中文日本語EntityQ1407873· pop 8· linked from 33 articlesHammar experimentAvailable in 8 languagesEspañolDeutschРусскийPortuguêsItalianoGalicianMacedonianvia Wikidata sitelinks · CC0ConnectionsSagnac effectEntityInternational Standard Book NumberEntityCategoriesAether theoriesPhysics experiments