4. Once the electrons are in a beam, for them to be of any use in TVs/computers, we need for the beam to be deflected. There are two ways the beam can be deflected.
Magnets can deflect the beam by being held close to it; North attracts the beam, South repels it.
Two parallel high-voltage charged plates, a pair of them horizontally and a pair vertically, placed around the path of the beam. If the plates are equally positive/negative, then the beam will carry on in the same direction, but if one of the plates has a higher positive/negative voltage, it will deflect the beam. The horizontal plates will affect the beam's up-and-down movement, the vertical plates will affect the beam's side-to-side movement.
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