CORDELIA MOLLOY / SCIENCE PHOTO LIBRARY CORDELIA MOLLOY / SCIENCE PHOTO LIBRARY
Magnetism. Iron filings being attracted to a bar magnet. The magnetic field of the magnet induces a small magnetic field in the iron filings, and the opposite magnetic poles than attract each other. The iron filings will remain magnetised for a time after the bar magnet has been removed.
Model release not required. Property release not required.