How Television Works: VIDEO/DVD, Peek inside a television set with Bob Symes while he explains the basic principles that make it work. A beam of electrons will travel in a straight line inside an airless (vacuum) tube; when the beam hits a fluorescent screen it creates a glowing spot. A magnet placed close to the beam will make it move. Our television sets have magnets that are controlled by signals sent from transmitters; these magnets change the positions and the brightness of the electron beam. These simple principles and a little electrical wizardry make the electron images on our TV sets move so fast that they appear to be moving pictures.


			How Television Works

Peek inside a television set with Bob Symes while he explains the basic principles that make it work. A beam of electrons will travel in a straight line inside an airless (vacuum) tube; when the beam hits a fluorescent screen it creates a glowing spot. A magnet placed close to the beam will make it move. Our television sets have magnets that are controlled by signals sent from transmitters; these magnets change the positions and the brightness of the electron beam. These simple principles and a little electrical wizardry make the electron images on our TV sets move so fast that they appear to be moving pictures. (6 minutes)

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VHS VIDEO

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DVD