Iron filings placed on top of a piece of paper with two rectangular magnets. The magnets north and south ends are noted and the shavings are used to reveal magnetic field lines | |
Licence : | Droits gérés |
Crédit: | Science Photo Library |
Taille de l’image : | 3872 px × 2592 px |
Model Release : | Non requis |
Restrictions : |
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