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57.9 MB (1.9 MB compressed)
4500 x 4500 pixels
38.1 x 38.1 cm ⏐ 15.0 x 15.0 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Iron filings attached to the end of a bar magnet. The filings preferentially line up along the magnetic field lines.
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