Story of radio

Date: 2015-10-07; view: 428.

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- Ти думаєш лише про власну вигоду (p.56), про те, що належить (p.55) тобі, про суму (p.56) грошей, яку ти можеш отримати. Я більше не зможу покладатись (p.56) на тебе. І не намагайся переконати (p.55) мене залишитись з тобою.

- Не роби вигляд (p.55) ніби ти була жертвою (p.54). Я завжди тебе слухав (p.56), забеспечував (p.54) тебе всім, і твоє рішення пов'язане (p.56) з тим, що ти знайшла когось багатшого.

The story of radio begins with Joseph Henry, an American physicist, who discovered in 1842 that electrical discharge was oscillating. A gigantic step forward was taken by James Maxwell. Maxwell showed that all electrical and magnetic phenomena could be reduced to stresses and motions in a medium, which he called the ether.

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, the famous German physicist, who was the first to create, detect and measure electromagnetic waves and thereby experimentally confirm Maxwell's theory of “ether” waves.

In 1895 A. S. Popov demonstrated the world's first radio receiver, which he called apparatus for the detection and registration of electric oscillations. In march 1896 at the meeting the words “Heinrich Hertz” were transmitted by wireless telegraphy in Morse code and similarly received before a distinguished scientific audience. Popov has become the inventor of the radio. Marconi invented a system of highly successful wireless telegraphy, inspired, and supervised its application.

During the first years of its development, radio communication was called “wireless telegraphy and telephone”. This name was too long and was later changed to “radio”. Wireless transmission was named radio transmission or simply “radio”.

The term “radio” now means the radiation of waves by transmitting stations, their propagation through space, and reception by receiving stations. The radio technique has become closely associated with many other branches of science and engineering and it is now difficult to limit the word “radio” to any simple definition.