Magnetic_field_of_horseshoe_magnet.png
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Summary
Description Magnetic field of horseshoe magnet.png |
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.
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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
Public domain Public domain false false |
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.
|
||
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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