Why evacuated vaccum tube is used in cathode ray experiment?
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Cathode rays carry electronic currents through the tube. Electrons were first discovered as the constituents ofcathode rays. J.J. Thomson used thecathode ray tube to determine that atoms had small negatively charged particles inside of them, which he called electrons.
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Cathode rays carry electronic currents through the tube. Electrons were first discovered as the constituents ofcathode rays. J.J. Thomson used thecathode ray tube to determine that atoms had small negatively charged particles inside of them, which he called electrons.
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Explanation:
The stream of electrons in cathode ray tube constitutes the cathode rays. Electrons are emitted by hot filament by the process of thermionic emission. These electrons pass through controlling and focusing device . They are accelerated by applying appropriate voltage between cathode and anode and finally made incident on a flourascent screen after passing through cross electric and magnetic fields.
Evacuated pump used to avoid path deviation of electron by air resistance
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