Today, the radio does not seem to be some unusual and unique device that is capable of wireless communication. However, there was a time when the radio was a real breakthrough in the development of new technologies. The history of radio has its roots in the distant past, to understand which this article will be.
The first prerequisites for the existence of electromagnetic waves arose in the late 1600s. Two centuries later, ultraviolet and infrared radiation were officially discovered. In the 1930s, Michael Faraday, a scientist from England, stated with great confidence that electromagnetic waves exist. After another 30 years, another British scientist, James Maxwell, completed the construction of the theory of the electromagnetic field, which has found its application in physics.
In the 1880-1890s. there were some more discoveries that allowed to bring the time when a full-fledged radio will be created. Thus, the physicist from Germany, Heinrich Hertz, proved the existence of electromagnetic waves through experiment. In subsequent years, several scientists at once repeated this experiment, while using more advanced elements to detect electromagnetic waves.
In 1898, Sir Oliver Joseph Lodge received a patent for the use of certain elements in wireless transmitters or receivers. The obtained patent became the basis of the mechanism for tuning the radio to the desired frequency. It is noteworthy that the Lodge did not conduct further research in this area, as a result of which the honor of wearing the title of inventor of the first radio went to Russian physicist, professor, electrical engineer Alexander Stepanovich Popov.
It was Popov who was the first to be able to demonstrate the ability to transmit a radio signal that would carry in itself certain information. Since that time, the era of the creation of radio equipment.
In the history of the radio has not been without incidents. Currently, several countries are claiming that it was their scientist who invented radio. In Germany they say that the merit belongs exclusively to Heinrich Hertz, in the USA they will tell you that Thomas Edison invented radio, etc.
Anyway, in 1872 Malon Loomis received the first patent for wireless communications.
In 1906, Canadian Reginald Fessenden made the first broadcast of a radio program in which he personally played the violin and read a small text from the Bible. Since that time, voice broadcasting has been developing every year more and more. New entertainment radio programs appeared, broadcasting was made to a wide audience.
In 1918, Edwin Armstrong introduced superheterodyne, which helps to improve the sensitivity of radio receivers in a wide frequency range. After more than 15 years, the same American scientist patented FM radio, which uses frequency modulation to reduce interference in the air.
At the very beginning of the 80s of the 20th century, work began in the field of creating digital broadcasting, which made another revolution in the history of radio.
It is currently difficult to find someone who has never listened to the radio. At the same time, few people think about those who invented it, what it cost those people who have spent many years of their lives for the sake of technical progress.
Today, radio remains one of the most common means of broadcasting, despite the development of television technology, computer technology, etc. The airwaves are still filled with sounds that seem never to end.
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