invento television


Television is a way of sending and receiving moving images and sounds over wires or through the air by electrical impulses. The big breakthrough in technology was the ability to send sound andpictures over the air. The word television comes from the Greek prefix tele and the Latin word vision or “seeing from a distance.” The TV camera converts images into electrical impulses, which are sentalong cables, or by radio waves, or satellite to a television receiver where they are changed back into a picture.
As with most inventions, television’s development depended upon previous inventions,and more than one individual contributed to the development of television, as we know it today. People started experimenting with television during the 19th century. When you ask the question--whoinvented television, you may get a few different answers.
In England in 1878, John Loggie Baird, a Scottish amateur scientist, successfully transmitted the first TV picture, after years of work, in 1926,with his mechanical system. Baird’s system used a mechanical camera consisting of a large spinning disc, with a spiral of holes that Paul Nipkow had developed in 1884. This old mechanical technologywas quickly replaced by superior electronic television.
Philo Farnsworth successfully demonstrated electronic television in San Francisco, in 1927. Farnsworth, at the age of fifteen, began imaginingways that electronic television could work. One day while working in the fields among rows of vegetables, he was inspired. He realized that a picture could be dissected by a simple television camera intoa series of lines of electricity. The lines would be transmitted so quickly that the eyes would merge the lines. Then, a cathode ray tube television receiver would change those lines back into apicture. Initially, television was available only in black and white, even though experiments with color began in the 1920s; however, you could not buy a color television until 1953.
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