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Radio Day (Russian: День радио ''Den' Radio''), Communications Workers' Day (as it is officially known in Russia) or Radio and Television Day (Ден на радиото и телевизията, as it is known in Bulgaria) is a commemoration of the development of radio in Russia. It takes place on 7 May, the day in 1895 on which Alexander Popov successfully demonstrated his invention. ==1895 demonstration and commemoration== In 1895, Popov gave the first public demonstration of radio as a tool before the Russian Physical and Chemical Society in St. Petersburg, using Sir Oliver Lodge's coherer as a lightning detector. Popov has generally been recognized in Eastern Europe as an "inventor of radio" (although it may be more due to politics than historical evidence), in contrast to the West's recognition of Guglielmo Marconi as the first to develop a viable system based on radio (Herzian) waves.〔Sungook Hong, Wireless: From Marconi's Black-box to the Audion, page 1〕 Radio Day was first observed in the Soviet Union in 1945, on the 50th anniversary of Popov's experiment, and some four decades after his death. Radio Day is officially marked in Russia and Bulgaria. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Radio Day」の詳細全文を読む スポンサード リンク
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