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| Keywords: Crookes tube2 diagram.svg Schematic diagram of a Crookes tube This was a cold cathode discharge tube invented by William Crookes and other physicists around the 1870s in which cathode rays electrons were discovered It consisted of a partially evacuated glass tube with two electrodes When a high potential of several thousand volts is applied between the electrodes cathode rays are emitted by the negative electrode right and travel in straight lines through the tube When they hit the glass wall of the tube left they cause it to glow or fluoresce In this common example a metal cross is placed in the tube in front of the cathode which blocks the rays The shadow it throws on the glowing back wall demonstrates that the cathode rays travel in parallel lines Ein Schemendiagramm einer Schattenkreuzröhre own work by Chetvorno and rebuilt by Drondent <br/><small>http //en wikipedia org/wiki/Image Crookes_tube2_diagram svg english Wikipedia </small> created on 2008-03-05 updated on 2008-09-12 <br/><small>uploaded on 2008-12-10</small> created by Chetvorno rebuilt by Drondent Chetvorno Image Crookes tube diagram svg shows an alternate version where the cross serves as the anode Files uploaded by D-Kuru Crookes tube ẩ | ||||
