When a change occurs in the local magnetic field, the mirror rotates slightly and the laser beam is deflected. Older versions have used photoresistors, but [the doctor] is shining his laser on a ...

These fields are all around us, even if you never see them. Earth's iron-rich core, for example, generates a powerful magnetic field that surrounds the planet. Your own brain also emits tiny ...

The aim of this module is to teach you the basic laws of electric and magnetic fields, their application to elementary problems involving steady and time changing fields and currents, and give you an ...