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File:Crookes tube-not in use-lateral view-standing cross prPNr°07.jpg

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English: Lateral view of a Crookes tube, an experimental vacuum tube invented by William Crookes around 1875. This is a common type used for demonstrations, first built by Juliusz Plucker. It has a plate in the shape of a Maltese Cross, which can be folded down against the floor of the tube. When a high voltage is applied between the cathode on the left and the anode at the bottom, cathode rays (electrons) are emitted by the cathode, and travel from left to right, striking the glass end wall of the tube, making it fluoresce with a yellow-green glow. When the cross is standing up, as here, it casts a cross shaped shadow on the glowing end wall, showing that cathode rays travel in straight lines.
Deutsch: Seitenansicht einer Form der Schattenkreuzröhre mit aufgerichtetem Kreuz die in der deutschen Wikipedia beschrieben wird.
Date Taken on 29 March 2007
Source Own work
Author D-Kuru
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w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Austria license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

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Author: D-Kuru/Wikimedia Commons
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current20:58, 12 April 2007Thumbnail for version as of 20:58, 12 April 20073,072 × 2,304 (2.33 MB)D-Kuru (talk | contribs){{Information |Description= {{en|Lateral view of a sort of a Crookes tube described in the german Wikipedia with a standing Cross}} {{de|Seitenansicht einer Form der Schattenkreuzröhre mit aufgerichtetem K

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