Back to our radio signal. The electrons in our wire are moving, but not in one direction. These electrons are moving back and forth. Actually, the wave displayed in the activity is a ...

Scientists in Japan have isolated an important type of electron for further study. Dirac electrons develop in certain ...

Let's first take a look at the signal. The signal is an electic current, and every electric current is actually electrons moving in a wire. Wire is made of metal, usually copper. All of the atoms ...