File:Hanging lodestone.png

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Hanging_lodestone.png (354 × 418 pixels, file size: 42 KB, MIME type: image/png)

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Description
English: A lodestone, a naturally magnetized piece of magnetite, hanging from a hook so it can act as a magnetic compass. The magnetic field of the Earth exerts a torque on the stone so its poles align with the magnetic poles of the Earth, pointing north and south. Lodestones were the first magnetic compasses. This stone has been coated with iron filings to show the locations of its magnetic poles. The filings align parallel to the magnetic field lines, so the places where the filings stand straight up indicates the locations where the field lines enter and leave the stone, its magnetic poles.

Caption: "A piece of lodestone swinging freely"
Date
Source Retrieved November 14, 2008 from Richard A. Gregory, Arthury Thomas Simmonds (1899) Exercises in Practical Physics for Schools of Science, Vol. 2, MacMillan and Co., New York, p. 87, fig. 61 on Google Books
Author Unknown authorUnknown author

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Date/TimeThumbnailDimensionsUserComment
current02:58, 4 January 2015Thumbnail for version as of 02:58, 4 January 2015354 × 418 (42 KB)Chetvorno (talk | contribs)User created page with UploadWizard

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