Alexander Stepanovich Popov (sometimes spelled Popoff; Russian: ??????´??? ?????´????? ????´?; March 16 [O.S.
March 4] 1859 – January 13 [O.S.
December 31, 1905] 1906) was a Russian physicist, who was one of the first persons to invent a radio receiving device.Popov's work as a teacher at a Russian naval school led him to explore high frequency electrical phenomena.
On May 7, 1895, he presented a paper on a wireless lightning detector he had built that worked via using a coherer to detect radio noise from lightning strikes.
This day is celebrated in the Russian Federation March 24, 1896 demonstration, he transmitted radio signals 250 meters between different campus buildings in St.
Petersburg.
His work was based on that of another physicist – Oliver Lodge, and contemporaneous with the work of Guglielmo Marconi.