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Alexander Bell, 1874-1922

A Scottish inventor, Alexander Bell, 1847—1922 inventord the telephone. He learned from the work of a German inventor. In 1850, the German found a way to send music along a wire but he was not able to do this with speech.

In March 1876, Bell's helper in the next room heard him say, 'Mr Watson come here. I went you. 'That was the first telephone message. Bell used electric signals to carry sounds.

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G.Marconi, 1874-1937

After the invention of the telephone, inventors worked on radio waves instead of electric signals to carry sound. Marconi, an Italian, was the first one to do this. In 1896, he sent a radio massage a distance of more than 1.5 kilometers. The following year, he sent a message from land to a ship at sea, a distance of 29 kilometers. Finally, in 1901, he sent a radio massage from England to America

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للأسف ماعرف أنقليزي .. يعطييك العافيه cheers

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مشكور على المعلومات ويعطيك العافية

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N!cE KeEp !t UP bom

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يعطيكم العفيه على الردود الرئعه

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THANK YOU VERY MUCH FOR TIS ARTICLE ABOUT Alexander Bell and G.Marconi

thank you

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اوهو هل الجليزي ورنانه ورانه Laughing

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