Datoteka:Crookes tube two views.jpg

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Opis
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.
Datum Fotografirano: 29. ožujka 2007.
Izvor 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
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w:hr:Creative Commons
imenovanje autora dijeli pod istim uvjetima
Ova datoteka je licencirana pod licencijom Creative Commons Imenovanje-Dijeli pod istim uvjetima 3.0 Austrija.
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Pod sljedećim uvjetima:
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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


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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.

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Ostale inačice 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

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motiv

nastanak

29. ožujka 2007

žarišna daljina

6,142 millimetre

vrsta medija

image/jpeg

checksum engleski

7567014304494e273ba7ff2c79bb2a4b36bbdecd

način određivanja: SHA-1

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524 554 Bajt

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2115 točka

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Datum/VrijemeMinijaturaDimenzijeSuradnikKomentar
sadašnja16:58, 7. svibnja 2008.Minijatura za inačicu od 16:58, 7. svibnja 2008.2022 × 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
Dobavljeno iz "https://hr.wiki.beta.math.wmflabs.org/wiki/Datoteka:Crookes_tube_two_views.jpg"