Home›Browse›optical medium🌐EnglishEnglishEspañolTürkçeРусскийفارسی中文EntityQ3566059· pop 12· linked from 62 articlesoptical mediumSign in to savematerial through which electromagnetic waves propagateAvailable in 12 languagesEspañol中文РусскийBanglaCatalanCzechGreekHebrewTeluguUkrainianفارسیvia Wikidata sitelinks · CC0