Jump to content

File:Glow discharge regions.jpg

Page contents not supported in other languages.
This is a file from the Wikimedia Commons
From Wikipedia, the free encyclopedia

Original file (3,334 × 1,380 pixels, file size: 1.55 MB, MIME type: image/jpeg)

Summary

Description
English: A classic glow discharge in a Crookes tube, a glass gas discharge tube evacuated to a pressure of around 10-5 - 10-6 torr, with a metal electrode inside at either end. The glow is due to a voltage of several thousand volts applied between the electrodes, which causes the gas inside the tube to ionize, allowing a current to pass through it. The cathode (negative electrode) is on the left, the anode (positive electrode) is on the right. The regions of the discharge from left to right are:
  • Cathode glow - the first purplish bright region on the left next to the cathode
  • Cathode dark space - the darker band between the two brighter region next to the cathode.
  • Negative glow - the second larger purplish bright region next to the cathode
  • Faraday dark space - the wide area without a glow near the center of the tube
  • Positive column - the pinkish glowing column filling the right side of the tube. The column shows a common feature called striations, alternating bright and dark bands, caused by an instability in the plasma.
  • Anode glow - the especially bright layer adjacent to the anode on the extreme right.
Alterations to original image: cropped
Date
Source
Author
  • Derived file: Chetvorno
  • Original file: Jannis Andrija Schnitzer
Other versions Gas discharge.jpg
Camera location49° 18′ 58.8″ N, 8° 32′ 39.6″ E Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

Licensing

w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic 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.
Annotations
InfoField
This image is annotated: View the annotations at Commons

Captions

A glow discharge

Items portrayed in this file

depicts

49°18'58.79999"N, 8°32'39.59999"E

17 March 2010

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current20:25, 14 July 2016Thumbnail for version as of 20:25, 14 July 20163,334 × 1,380 (1.55 MB)ChetvornoUser created page with UploadWizard

The following 4 pages use this file:

Global file usage

The following other wikis use this file:

Metadata