Talk:Crookes tube
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The stream of electrons in a Crookes tube was long ago thought to be a ray, and the terminology is still a part of our language as in cathode ray tube which is often used as a synomyn for an ocilloscope tube or TV picture tube. Neil Ccpoodle 00:04, 5 April 2007 (UTC)
[edit] Did Crookes tubes ever use a filament?
I can't find any reference to Crookes tubes using a heated cathode, as the article and diagram show. These references describe Crookes tubes as cold cathode tubes: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 The significant experiments on cathode rays using Crookes tubes, done by Hittdorf, Crookes, Goldstein, Plucker, Lenard, Rontgen, and J. J. Thompson, as far as I can tell, seem to have used cold cathode tubes. Although thermionic emission, the 'Edison effect', was discovered by Edison in 1880, and could have been used to generate cathode rays, it was a curiosity and not understood. Does anybody have any info about this? --ChetvornoTALK 18:20, 1 May 2008 (UTC)
