Ficheru:Crookes tube two views.jpg

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Esti ficheru ye de Wikimedia Commons y puen usalu otros proyeutos. La descripción de la páxina de descripción del ficheru amuésase darréu.

Descripción
English: Two photos of a Crookes tube; one by ordinary light and one showing it in operation lit by its own fluorescence. In operation several thousand volts of DC electricity is applied between the two electrodes in the tube. The electrode to the left is the cathode or negative electrode, the electrode in the L-shaped tube at bottom is the anode or positive electrode. Electrons released by the cathode are attracted toward the positive space charge in center of the tube, created by the positive anode at bottom, and they accelerate down the tube to the right. Because of inertia, many electrons speed past the anode rather than actually hitting it. They hit the glass wall of the tube, making the glass fluoresce green; after that, they eventually travel to the anode and leave the tube, passing through the wires and the power supply and back to the cathode. The cross-shaped metal plate blocks the electrons, casting a cross-shaped shadow on the glowing wall, demonstrating that the electrons travel in straight lines. The cross can be folded down against the floor of the tube, showing it is the cause of the shadow. The shadow can be moved and distorted by holding a permanent magnet to the side of the tube, demonstrating the bending effect that magnetic fields exert on electron rays. This 'Maltese cross' demonstration form of Crookes tube was first made by Juliusz Plucker in 1869, and was very popular in classrooms around the turn of the century. Alterations to image: Cropped component images and combined into one image.
Data Taken on 29 marzu 2007
Fonte File:Crookes tube-not in use-lateral view-standing cross prPNr°07.jpg and File:Crookes tube-in use-lateral view-standing cross prPNr°11.jpg
Autor D-Kuru
Permisu
(Cómo reutilizar esti ficheru)
I, D-Kuru the author of this image, release it under the following licences:
w:en:Creative Commons
reconocimientu compartir igual
This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Austria license.
Ye llibre:
  • pa compartir – pa copiar, distribuir y comunicar públicamente la obra
  • pa remezclar – p'adautar la obra
Baxo les condiciones siguientes:
  • reconocimientu – Tienes de dar el créitu apropiáu, apurrir un enllaz a la llicencia ya indicar si realizasti dalgún cambéu. Puedes faelo de cualquier mou razonable ,pero non de manera que suxera l'encontu del autor pa ti o pal usu que faigas.
  • compartir igual – Si entemeces, tresformes o te bases nesti material, tienes de distribuir les tos contribuciones baxo la mesma llicencia o una compatible cola orixinal.
w:en:Creative Commons
reconocimientu compartir igual
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Austria license.
Ye llibre:
  • pa compartir – pa copiar, distribuir y comunicar públicamente la obra
  • pa remezclar – p'adautar la obra
Baxo les condiciones siguientes:
  • reconocimientu – Tienes de dar el créitu apropiáu, apurrir un enllaz a la llicencia ya indicar si realizasti dalgún cambéu. Puedes faelo de cualquier mou razonable ,pero non de manera que suxera l'encontu del autor pa ti o pal usu que faigas.
  • compartir igual – Si entemeces, tresformes o te bases nesti material, tienes de distribuir les tos contribuciones baxo la mesma llicencia o una compatible cola orixinal.

Attribution, disclaimer and additional Information:

Attribution:
Attribute me as "D-Kuru from Wikimedia Commons" or "D-Kuru/Wikimedia Commons". Second suggestion is preferred. You can find an example of how the image could be used in the „Disclaimer“ section. You can also visit the help page Commons:Reusing content outside Wikimedia for further information.

Used camera:
This image was taken using a Canon Digital IXUS 850 IS.
Author: D-Kuru/Wikimedia Commons
Licence: CC-BY-SA-3.0-AT


Disclaimer:
Even I'm the only copyright holder of this two-dimensional work I can't exclude that third parties or local and/or international law may can restrict the reuse of this image. Possible restrctions could be due to personality rights, copyright (e.g. on buildings) and/or law such as the "Freedom of panorama".

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Even hyperlinks to my user page on Wikimedia Commons and this page are not required, they are requested. Also not required is a notification if you use this image anywhere but it nice to hear from you.
If you want to use my image under different licenceconditions you can cantact me on my talkpage or you can send me a mail.
I upload all my files in the highest possible resolution and/or bitrate so I can't offer higher resoluted images and/or better quality for my video and/or audio files. However, if you want to have an image from a different angle you can contact me and I can see if I can help you.

Keep in mind that this text does not affect the other usage conditions of the licences (could be „Share Alike“, „make clear to others the license terms of this work“, etc.) in any way! On the right side you can see an example of how the image could be used correctly according to the licenceconditions.

Otres versiones Component images: File:Crookes tube-not in use-lateral view-standing cross prPNr°07.jpg, File:Crookes tube-in use-lateral view-standing cross prPNr°11.jpg

Wikipedia

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actual16:58 7 may 2008Miniatura de la versión a fecha de 16:58 7 may 20082022 × 2115 (512 kB)wikimediacommons>Chetvorno{{Information |Description=Two photos of a Crookes tube; one by ordinary light and one showing it in operation lit by it's own fluorescence. Alterations to image: Cropped component images and combined into one image. |Source=[[:Image:Schattenkreuzröhr

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