The Story of Radio

Date: 2015-10-07; view: 474.

The invention of radio was one of the greatest achievements of the 19^th Century. Many famous scientists made a great contribution development. The story of radio begins perhaps with Joseph Henry, who discovered in 1842 that electrical discharges were oscillating. A gigantic step forward was taken by James Maxwell, who showed that all electrical and magnetic phenomena could be reduced to stresses and motions in a medium, which he called the ether.

In 1878 David Hughes, found that а loose contact in a circuit containing a battery and a telephone receiver would give rise to sounds in the receiver which corresponded to those that had impinged upon the diaphragm of the mouthpiece.

In 1883 George Fitzgerald suggested a method by which electromagnetic waves might be produced by the discharge of a condenser. Next we must turn to Heinrich Hertz, who was the first to create, detect and measure electromagnetic waves.

A.S Popov was in 1895 a lecturer in physics. He set up a receiver in 1895, and read a paper about it at the Meeting of the Russian Physico-Chemical Society on April 25 (May 7, New style) 1895. He demonstrated the world`s first radio receiver, which he called “an apparatus for the detection and registration of electric oscillations”. By means of this equipment, Popov could register electrical disturbances, including atmospheric ones. Popov has become the inventor of the radio, May 7 being celebrated each year as “Radio Day”.

Marconi invented a system of highly successful wireless telegraphy, and inspired and supervised its application. Such is the story of the inventors of wireless telegraphy.