File:Kolbe electroscope.png
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Size of this preview: 398 × 599 pixels. Other resolutions: 159 × 240 pixels | 406 × 611 pixels.
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English: Drawing of an aluminum-vane or Kolbe electrometer (electroscope), a precision form of gold-leaf electroscope, from an early 20th century scientific equipment catalog. This detected electric charge using a thin flat aluminum vane hanging next to a flat vertical metal plate. When an electrostatic charge was applied to the top terminal, the vane and plate received the same charge, causing the vane to be repelled and pivot away from the plate (shown) due to the Coulomb force. The magnitude of the charge could be calculated from the scale. |
| Date | |
| Source | Downloaded 2012-03-04 from Max Kohl Physical Apparatus catalog, price list No. 50, Vol. 2 & 3, Chemnitz, Germany, p. 802, fig. 60196 on Instruments for Science collection, Smithsonian Institution website |
| Author | Unknown author |
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 23:27, 4 March 2012 | | 406 × 611 (44 KB) | Chetvorno (talk | contribs) |
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