Iron filings placed on top of a piece of paper with two rectangular magnets underneath it. The magnets have north and south ends. In this photo,the north and south sides of the magnets are facing each other,causing a magnetic attraction | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Science Source |
Taille de l’image : | 3799 px × 2487 px |
Model Release : | Non requis |
Restrictions : |
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