Fitxategi:Crookes tube two views.jpg

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Jatorrizko fitxategia (2.022 × 2.115 pixel, fitxategiaren tamaina: 512 KB, MIME mota: image/jpeg)

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Deskribapena
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 2007ko martxoaren 29a
Jatorria 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
Egilea D-Kuru
Lizentzia
(Fitxategi hau berrerabiltzen)
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This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Austria license.
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w:eu:Creative Commons
eskuduntza berdin partekatu
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Austria license.
Askea zara:
  • partekatzeko – lana kopiatzeko, banatzeko eta bidaltzeko
  • birnahasteko – lana moldatzeko
Ondorengo baldintzen pean:
  • eskuduntza – Egiletza behar bezala aitortu behar duzu, lizentzia ikusteko esteka gehitu, eta ea aldaketak egin diren aipatu. Era egokian egin behar duzu hori guztia, baina inola ere ez egileak zure lana edo zure erabilera babesten duela irudikatuz.
  • berdin partekatu – Lan honetan oinarrituta edo aldatuta berria eraikitzen baduzu, emaitza lana hau bezalako lizentzia batekin argitaratu behar duzu.

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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.

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Author: D-Kuru/Wikimedia Commons
Licence: CC-BY-SA-3.0-AT


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Beste bertsioak 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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Fitxategi honetan agertzen diren itemak

honako hau irudikatzen du

sorrera data

29 martxoa 2007

exposure time ingelesa

2 segundo

f-number ingelesa

3,2

foku-distantzia

6,142 milimetro

media type ingelesa

image/jpeg

checksum ingelesa

7567014304494e273ba7ff2c79bb2a4b36bbdecd

zehazteko metodoa: SHA-1

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524.554 Byte

altuera

2.115 pixel

zabalera

2.022 pixel

Fitxategiaren historia

Data/orduan klik egin fitxategiak orduan zuen itxura ikusteko.

Data/OrduaIruditxoaNeurriakErabiltzaileaIruzkina
oraingoa16:58, 7 maiatza 200816:58, 7 maiatza 2008 bertsioaren iruditxoa2.022 × 2.115 (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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