Magnetic Fields

Magnetic fields either emanate out from a permanent magnetic source, such as a permanent magnet or they are momentarily created by raising or falling electric fields. The 60 Hz A/C electricity coming into your house on wires or the 600 Kilo Hz radio signal coming into your AM radio through the atmosphere, are being propagated as electromagnetic waves. Waves penetrate things that they are able to pass through and are deflected or absorbed from things that they can't pass through. Here shielding can be useful.

Offered by Ed