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What determines light intensity in a CRT?

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What determines light intensity in a CRT?

(a) voltage

(b) current

(c) momentum of electrons

(d) fluorescent screen

This question was posed to me in an interview.

My query is from Cathode Ray Tube topic in division Oscilloscopes of Electrical Measurements

1 Answer

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Correct answer is (c) momentum of electrons

The explanation is: Momentum of the electrons gives the intensity or brightness of the light emitted from the fluorescent screen due to electron bombardment. It is given as the product of the no of electrons and their speed.

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