A magnet is used to separate iron filings from sand. Sand is not attracted to the magnet but the iron filing are pulled out due to the magnetism. This image is before the filing have been attracted to the magnet. 1 of 2. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Science Source / Charles D. Winters |
Taille de l’image : | 3401 px × 5120 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |