What’s the difference between AM and FM radio waves?

Radios are like magical devices. You just flip a switch and BAM, you can listen to everything from punk rock to world news. But how exactly does a radio work? And what’s the difference between AM and FM radio? We asked physics expert Angie Huerta to help us find the answer.Got a question that’s AM-azing? Send it to us at BrainsOn.org/contact, and we’ll dial in the answer.