Alexander Stepanovich Popov span>
Alexander Stepanovich Popov was born (4) 16 March in 1859 in the village of Turinskie Mines (now Krasnotur'insk Sverdlovsk region). After graduating in 1882, the Physics and Mathematics Faculty of St. Petersburg University, engaged in scientific research and taught physics and electrical engineering at a number of technical schools. In 1901 he became professor of physics, and in 1905 — the director of the St. Petersburg Electrotechnical Institute.
Popov's research interests lie in the field of electrodynamics. He has set a goal to construct a wireless alarm system for use in the Navy on the basis of electromagnetic waves. In the first phase Popov found a sensitive indicator of electromagnetic waves — it was the radio conductors E.Branli. In the second phase of the experiment Popov created directly radio. By the spring of 1895 a reliable and sensitive instrument was ready.
At a (on April 25) May 7 1895 meeting, the physical separation of the Russian Physical and Chemical Society Popov was presented a research report about the invention of wireless communication and demonstrated her work.
In memory of this event since 1945 on May 7 in Russia celebrated Radio Day. By improving the transmitting and receiving devices, Popov made-range signal transmission in 150 km.
Popov also studied X-rays and made the first in Russia X-ray images of objects and human body parts.
Activities Popov was appreciated by his contemporaries, he received a gold medal at the World Exhibition in Paris in 1900.
died scientist Alexander Stepanovich Popov (December 31 in 1905) on January 13 in 1906 in St. Petersburg.