Learning on ScreenDischarge Through Gases
- Synopsis
- Shows the discharge patterns which occur when pressure is progressively reduced, and explains the theory of discharge through rarefied gases. Animated diagrams explain stage by stage how light is produced by the displacement of electrons after collision with gas atoms in the tube. Changes in potential along the tube cause the familiar alternate bands of Crookes dark space, negative glow, Faraday dark space and positive column. Ends with photographs of some modern applications of the theory
- Language
- English
- Country
- Great Britain
- Medium
- Film; Film. 16mm. sd. b&w. 12 min.
- Technical information
- Black-and-white / Sound
- Year of production
- 1955
- Availability
- OUT OF DISTRIBUTION
- Uses
- Introductory courses.*
- Subjects
- Physics
- Keywords
- atoms; electrons; gases
Credits
- Director
- M Crosfield
- Producer
- F Hoare
Distribution Formats
- Type
- Film
- Format
- 16mm
Production Company
Sponsor
- Name
Mullard Ltd
Distributor
- Name
National Education Video Library
- Contact
- John Lovell
- tryfannevl@aol.com
- Phone
- 01286 676001 or 07768 105467
- Fax
- 01286 676001
- Address
- Arfon House
Bontnewydd
Caernarvon
Gwynned
LL54 7UN - Notes
- Formerly the National Audio Visual (Aids) Library. No longer holds 16mm material. Retains the negatives and copyright to the EFVA material, but have no viewing copies. Video only. (1/97) Alternative address might be Arfon House, Bontnewydd, Caernarvon, Gwynned LL54 7UN Telephone/Fax 01286 676001
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