The direction of magnetic field lines represented by iron filings sprinkled on a piece of acrylic placed above two round magnets. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Science Source / Alexandre Dotta |
Taille de l’image : | 3924 px × 2928 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |