File:FranckHertzHgTube.jpg
Summary
Photograph of a glass vacuum tube (2.7 cm diameter) used for the <a href="https://en.wikipedia.org/wiki/Franck-Hertz_experiment" class="extiw" title="en:Franck-Hertz experiment">Franck-Hertz</a> experiment in teaching laboratories. The tube was manufactured by 3B Scientific (part number U8482170). There's 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.
Licensing
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:47, 15 January 2017 | | 1,043 × 2,376 (846 KB) | 127.0.0.1 (talk) | Photograph of a glass vacuum tube (2.7 cm diameter) used for the <a href="https://en.wikipedia.org/wiki/Franck-Hertz_experiment" class="extiw" title="en:Franck-Hertz experiment">Franck-Hertz</a> experiment in teaching laboratories. The tube was manufactured by 3B Scientific (part number U8482170). There's 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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