Magnetic field

Magnetic field

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Credit: CORDELIA MOLLOY/SCIENCE PHOTO LIBRARY

Caption: Magnetic field. Coloured image of iron filings aligned along the magnetic field lines surrounding a bar magnet. 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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Keywords: bar, coloured, computer enhanced, false-colour, false-coloured, ferromagnetic, iron filings, line, lines, magnet, magnetic field, magnetism, metal, north, physical, physics, pole, poles, south

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