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Cathode rays produce ……………on the walls o...

Cathode rays produce ……………on the walls of the discharge tube.

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Cathode rays consist of

(I) Cathode rays produce heat, when allowed to fall on matter. (II) Cathode rays produce X-ray, when allowed to fall on material of high atomic weight. (III) Cathode rays are positively charged particles (IV) Cathode rays ionize the gas.

The mean free path of electrons in the gas in a discharge tube is inversely proportional to the pressure inside it. The Crookes dark space occupies half the length of the discharge tube when the pressure is 0.02 mm of mercury. Estimate the pressure at which the dark space will fill the whole tube.

Cathode rays are discovered by ….

When cathode rays are focused on thin metal foil, it gets heated up to ……………

Cathode rays are nothing but ________ .