High Quality Content by WIKIPEDIA articles! Alexander Stepanovich Popov was a Russian physicist who first demonstrated the practical application of electromagnetic (radio) waves, although he did not apply for a patent for his invention.Beginning in the early 1890s he continued the experiments of other radio pioneers, such as Heinrich Hertz. In 1894 he built his first radio receiver, a version of the coherer. Further refined as a lightning detector, it was presented to the Russian Physical and Chemical Society on May 7, 1895—the day has been celebrated in the Russian Federation as "Radio Day". The paper on his findings was published the same year.

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