Why is a cathode ray tube connected to a vacuum pump?

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04-08-2016
Physics

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Why is a cathode ray tube connected to a vacuum pump?

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taskmasters taskmasters · Answer 1 · 2016-08-07T06:05:23+02:00

taskmasters taskmasters

07-08-2016

A cathode ray tube functions at a low pressure air pressure. To do this, air has to be pumped out of the tube. Therefore, a vacuum pump has to be used. Cathode rays can't penetrate through any amount of air. Hope this answers the question.

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