LAWRENCE LAWRY / SCIENCE PHOTO LIBRARY LAWRENCE LAWRY / SCIENCE PHOTO LIBRARY
Horseshoe magnet. Metal filings being temporarily magnetised by a permanent iron magnet (horseshoe- shaped). Magnetism is mostly a property of metals. It is a force exerted at a distance by a field, in this case generated by moving electric charge on a subatomic level (electrons). The force can attract or repel, with a horseshoe magnet having a north (N) and a south (S) pole with one attracting and the other repelling. The filings will lose their magnetism when they are removed from the presence of the permanent magnet.
Model release not required. Property release not required.