File:Franck Hertz Hg tube.jpg
Franck_Hertz_Hg_tube.jpg (263 × 599 pixels, file size: 21 KB, MIME type: image/jpeg)
Nonfiction: Photograph of a glass vacuum tube (2.7 cm diameter) used for the Franck-Hertz experiment in teaching laboratories. The tube was manufactured by 3B Scientific (part number U8482170). There is a small drop of mercury inside; the vapor pressure of the mercury is controlled by the temperature of the tube. The glowing orange dot labeled C is the hot cathode, which emits electrons. The grid labeled G is a metal screen that lets most electrons pass. The metal disk labeled A is the anode that collects the electrons.
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Nonfiction cross-reference
External links:
- Franck–Hertz experiment @ Wikipedia
Attribution:
Licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. By: E. A. Schiff
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:12, 2 April 2017 | | 263 × 599 (21 KB) | Admin (talk | contribs) |
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