Magnetic field. Iron filings aligned along the magnetic field lines surrounding a bar magnet. The poles are marked north (N) and south (S). The magnet

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Magnetic field. Iron filings aligned along the magnetic field lines surrounding a bar magnet. The poles are marked north (N) and south (S). The magnetic field induces magnetism in the needle-shaped filings, giving each a north and south pole. The magnetised filings align in thin arcing lines due to the interactions between them, even though the magnetic field itself is continuous. Magnetism is a property of ferromagnetic metals (such as iron, nickel and cobalt) caused by the alignment of the spins of the electrons in the metal.

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Size: 3460px × 5064px
Photo credit: © CORDELIA MOLLOY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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