the first steps The principle of radio, as its general telegraphy, is a continuation of telegraphy:

the first steps The principle of radio, as its general telegraphy, is a continuation of telegraphy: you could call, wireless telegraphy. It is the transmission of sound or telegraph cheap flights signals over long distances without lag metallic conductor. Used electromagnetic waves of relatively long length (0.01 m and above). Around 1865, the Maxwell (JC Maxwell) the radiotelegraphy expressed as a theory. It was the first, chronologically, application of the theory of the electromagnetic field. According to this theory, which is one of the largest and epanastatikoteres attempts combination of natural phenomena into a unified cheap flights whole, the visual phenomena have a close affinity with the electrics. cheap flights The Maxwell supported the existence of electromagnetic waves having the same characteristics as the natural light, but differ from it only by the length of the wave. But Farantai (M. Faraday) was the first to set the foundation for the doctrine of the electric and magnetic cheap flights field (1837-1846), was he promoted the idea that the spread cheap flights of electric and magnetic phenomena is done with finite speed and a wave process . Maxwell's theory was accepted with many reservations from the scientific world of his time, but the experiments of Hertz (H. Hertz) verified this theory (1886-1889). Hertz was able to produce, to observe and study the electromagnetic waves and, with his experiments resulted in the same findings with those of Maxwell, cheap flights which was only theoretical. Consequently, we can say that since the Hertz invented telegraphy, but it had become the second major step, the practical application. Hertz able to generate and transmit these waves with the help of an oscillator stimulated by a spark discharge. With the aid of a second oscillator in which xespage a spark gap, the effect of taking wave Hertz unable to detect electromagnetic waves. Able to show that these waves can, just like the bright, suffer reflection, input and bias, but did not provide the possibility of using radio waves to transmit information. The phenomenon of resonance studied by Bzerknes (VFK Bjreknes), in 1891, and played a key role in the experiments of Hertz. One guy, great significance was reached very early, in 1853, by Thompson (W. Thomson), whereby one could determine the resonant frequency of a floating circuit, absent damping. The Branlei (E. Branley), 1890, in France, had discovered the tube consistency, which was the first sensitive detector of electromagnetic waves. This coherer designed by Łódź (O. Lodge), in England, in 1894, who repeated the experiments of Hertz, with a tube full of metal shavings that had electrodes at both ends. Towards this direction worked several scientists like Em. Dragoumis among them. Crucial contribution of Russian A. S. Popov (AS Popov), who, in 1895, invented full probe of electromagnetic waves, which are generated by atmospheric disturbances. She worked her paper Hertz, trying to succeed
2011 (7) April (7) HISTORY BY WIKIPEDIA PURPOSE OF INSTRUCTION & TEACHING PERFORMANCE CAMERA cheap flights RADIO - HISTORICAL DEVELOPMENT TILEGRAFOS cheap flights HISTORICAL EVOLUTION OF THE PHONE HISTORY HISTORY IN EPOIKOINONIA