? Dotted LIGHT from one single wire

… a simple electric circuit low voltage power - supply and a thin wire

Suppose the current is large enough to make the wire glow, what would you expect ? A B

and this is what you will see :

… and guess a reason for this Look closer … … and guess a reason for this You see the shape of the glowing spots And think of the space between them Have you seen this before ?

an alternating current You are right ! It’s a standing wave And how to get this ? All you need is … A magnet ! and of course …. an alternating current

are wrong ! in addition: …with a direct current both of these pictures A and B are wrong !

What you really get … Think HOT !!! …is this