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Summary
| Description |
English: Photo of the magnetic field of two bar magnets with unlike poles close together. The magnetic field is made visible in the patterns of a layer of iron filings on a piece of paper laid on top of the magnets. The iron filings are shaped like long thin needles, and orient themselves parallel to the magnetic field lines at each point. From a 1916 physics text. Alterations to image: Changed bluish background to white by adjusting brightness, converted to greyscale, cropped out caption, converted to 24 greyscale PNG. |
| Date | |
| Source | Downloaded August 25, 2008 from Alexander Wilmer Duff, et. al. (1916) A Textbook of Physics, P. Blakiston's Son & Co., Philadelphia, USA, p.313, fig.234a on Google Books |
| Author | Alexander Wilmer Duff |
| Permission (Reusing this file) |
Public domain in the USA - published in the USA prior to 1923 |
Licensing
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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 | 07:15, 26 August 2008 | | 704 × 451 (153 KB) | Chetvorno | == Summary == {{Information |Description={{en|1=Photo of the magnetic field of two bar magnets with unlike poles close together. The magnetic field is made visible in the patterns of a layer of iron filings on a piece of paper laid on top of the magnets. |
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