Simply put, if electronic engineers were to explain how does a TV work, they'd say it's the conversion of electromagnetic waves into light and acoustic energy. The interplay of light and acoustic energy inside the TV tube and out the screen is what people view when watching TV.
The wireless electromagnetic waves are sent or transmitted to the TV antenna or receives from TV towers. TV stations send these signals or waves to distant places by bouncing them off these powerful towers, reaching remote places. For international transmissions, signals are bounced off through satellites hovering in outer space. In a broader sense, this explains how does a TV work.
It was Michael Faraday who first tried to show people how does a TV work. Well, it wasn't exactly an actual television set he was demonstrating but the relationship or workings of light and electricity to produce some images in the 1830s. After about a hundred years, more improvements were done on faraday's work and soon TV sets began being produced en masse for commercial purposes.
The years prior to mastering how does a TV work were a series of trial and error, tirelessly re-designing and improving on various devices for better transmission and reception of electronically sent patterns or signals of light and sound. Such light and sound transmissions revolutionized radio receptions that brought mere acoustic information. Now, acoustic data were coupled with interesting images through lighting information.
Then in 1883, they made a more daring experiment to improving how does a TV work. To transmit image information electronically and store it, they used a mechanical media which was a like a scanning disk. This perforated disk rotated as it presented images in broken stages. To make this really work, a photo cell was placed at the rear of the disk as it rotated. The sensitized photo cell took care of sending the broken images as a sequence of electrical stimuli to a receptor. Then everything was beamed to another rotating disk which composed the initial image. However, the experiment was not that successful. The image resolution was poor.
The 1900s brought hope in realizing the mechanism needed to make a decent TV set really work. Now they had better ways on showing how does a TV work. Technological advances leading to breakthroughs in radio, physics, x-rays, and more sophisticated wireless transmissions made success in finalizing how does a TV work, and more so, the coming of the cathode-ray tube.
Cathode-ray tube came with a magnetic field. It was ideal for receiving electronic images. It was Boris Rosing, a Russian scientist, who made Cathode-ray tube possible and further improved on this latest electronic find. Then a thing called Iconoscope also came into the picture. It scanned and converted electronic signals through an electronic beam really nice and easy. With the help of other inventions, like the Mosaic for microscopic photosensitive pixels, the first useful and decent TV set was born in 1929 and then mass produced by the 1940s.
Since then, electronic experts began to have a definite answer to how does a TV work.
Peter Garant is writing electronic appliance and information articles such as How does a Plasma TV work and How does a LCD TV work for the electronic and technical website 'Tech FAQ'.
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