File:Cyclotron motion smaller view.jpg
Jump to navigation
Jump to search
Original file (1,383 × 1,749 pixels, file size: 167 KB, MIME type: image/jpeg)
Summary
| Description |
Français : Un faisceau d'électrons défléchis par un champ magnétique forme un cercle par effet cyclotron. La lueur provient de l'excitation des atomes gazeux prisonniers de l'ampoule.
English: Beam of cathode rays (electrons) in a demonstration vacuum tube moving in a circle in a magnetic field (cyclotron motion). The electrons are produced by an electron gun at bottom, consisting of a hot cathode, a metal plate heated by a filament so it emits electrons, and a cylindrical metal anode at a high voltage which accelerates the electrons into a beam. The red circular Helmholtz coil partially visible behind the tube generates a horizontal magnetic field that exerts a Lorentz force on the electrons. The force on the electrons is perpendicular to their direction of motion, causing them to bend into a circular path. Cathode rays are normally invisible, but enough air has been left in the tube so that the air molecules glow pink from fluorescence when struck by the fast-moving electrons. |
| Date | |
| Source | File:Cyclotron_motion_wider_view.jpg |
| Author | Sfu |
This is a cropped image of File:Cyclotron motion wider view.jpg. It only displays the bulb.
Licensing
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported 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.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:58, 16 August 2012 | No thumbnail | 1,383 × 1,749 (167 KB) | wikimediacommons>Cantons-de-l'Est |
File usage
The following page uses this file:
