Q: Who invented RADIO ?
In 1894 in Kolkata (Calcutta), Sir Jagdish Chandra Bose (J. C. Bose) invented the mercury coherer, together with the telephone receiver.
Alexander Stepanovich Popov, in 1894, built his first radio receiver, which contained a coherer but actually coherer was first demonstrated by J.C. Bose. Popov demonstrated the coherer, further refined as a lightning detector, to the Russian Physical and Chemical Society on May 7, 1895.
In 1894, Guglielmo Marconi read about Hertz's and Tesla's work on wireless telegraphy, and began his own ...more