File:Magnetic field of horseshoe magnet.png
Size of this preview: 368 × 599 pixels. Other resolutions: 147 × 240 pixels | 471 × 767 pixels.
Original file (471 × 767 pixels, file size: 117 KB, MIME type: image/png)
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Summary
| Description |
English: Photo of magnetic field of a horseshoe magnet. The magnetic field was made visible by sprinkling a layer of iron filings on a sheet of paper laid on top of the magnet. The filings are shaped like tiny needles, and orient themselves with their long axis parallel to the magnetic field at each point. The field pattern is slightly unsymmetrical, showing the magnet's righthand pole is slightly stronger than its left. Alterations to image: Converted to greyscale, increased brightness of high value pixels to eliminate background tint, cropped image rectangular, rotated image 90° CW, used clone tool to replace box with initials 'F. E. A.' in lower left corner. |
| Date | |
| Source | Downloaded August 25, 2008 from Frank Eugene Austen (1916) Examples in Magnetism, 2nd Ed., Hanover, N.H., USA, p.31, plate 2 on Google Books |
| Author | Frank Eugene Austin - image had initials 'F.E.A.' in lower left corner. |
| Permission (Reusing this file) |
Public domain in USA - published in 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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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:35, 10 September 2008 | | 471 × 767 (117 KB) | Chetvorno | == Summary == {{Information |Description={{en|1=Photo of magnetic field of a horseshoe magnet. The magnetic field was made visible by a layer of iron filings on a sheet of paper laid on top of the magnet. The filings are shaped like tiny needles, and or |
| 07:51, 26 August 2008 |  | 767 × 471 (120 KB) | Chetvorno | {{Information |Description={{en|1=Photo of magnetic field of a horseshoe magnet. The magnetic field is visible in the patterns of a layer of iron filings on a sheet of paper laid on top of the magnet. Alterations to image: Converted to greyscale, increa |
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