does anyone know how cathode rays are formed?

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does anyone know how cathode rays are formed?

2007-11-03 03:11:17 · 3 answers · asked by Umang G 1 in Science & Mathematics ➔ Physics

3 answers

See reference below

2007-11-03 03:24:25 · answer #1 · answered by Edward 7 · 0⤊ 0⤋

According to Sir JJ Thomson

Consider a Cathode ray tube ....a glass tube which is evacuated ... where Pressure is 0.001 of Mercury ...inside there r 2 plates +ive n -ive separated by a finite distance ... let current let 2 plates be connected to a battery ... den u find a fluorescent spot opp to the -ive plate ... these r cathode particles

2007-11-03 03:23:09 · answer #2 · answered by Yogesh K 2 · 0⤊ 0⤋

i think they arise when the tungsten (or other) element gets so hot it starts spitting out the excited electrons

that is to say, the e- have enough energy to escape from the material.

2007-11-03 03:27:03 · answer #3 · answered by Anonymous · 0⤊ 0⤋