A magnetic field is invisible, but it can be detected using a magnetic compass. A compass contains a small bar magnet on a pivot so that it can rotate. The compass needle points in the direction ...

If you need help visualizing magnetic fields, these slow-motion video captures should educate or captivate you. Flux lines are difficult to describe in words, because magnet shape and strength ...

Accompanying those electrical signals are tiny magnetic fields that have only recently been tapped for information into how the human body works. “Our natural magnetic fields offer a different ...