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May 15 at 17:43 vote accept entropy
May 15 at 17:43 comment added entropy Right, thanks a lot. Makes a lot more sense now. Thanks for the time and effort.
May 15 at 16:16 comment added Buttonwood @entropy Cathode rays are the result of discharging electrons on gas molecules (thus, i) light is seen already between anode and cathode, ii) there can be multiple/different sorts of charged molecules generated). Anode rays are the result of electron impact on the surface of a solid target (hence reference to the conventional X-ray tube, though I presume today it equally could be a liquid (microfocus / molten metal jet X-ray tube), too).
May 14 at 15:39 comment added entropy Thanks for the wonderful answer. Could you please elaborate on why this isn't required in the case of cathode rays? I couldn't understand that quite well.
May 14 at 15:28 history answered Buttonwood CC BY-SA 4.0