EntityQ1469765· pop 24· linked from 1,259 articlesoptical communicationSign in to savecommunication at a distance using light to carry informationConnectionslightEntityRoyal SocietyEntitytelegraphyEntitywireless communicationEntityInformation AgeEntityinternational maritime signal flagEntitysmoke signalEntitysemaphore lineEntitybeaconEntityoptical amplifierEntityradiotelephoneEntitysignal lampEntityJun-ichi NishizawaEntityFranceCountrySpainCountryUnited KingdomCountrySwedenCountryInternetEntityGreekEntityThomas EdisonEntityCategoriesOptical communicationsTelecommunications