Explore the wonderful world of waves! Even observe a string vibrate in slow motion. Wiggle the end of the string and make waves, or adjust the frequency and amplitude of an oscillator.
Ever wonder how a compass worked to point you to the Arctic? Explore the interactions between a compass and bar magnet, and then add the earth and find the surprising answer!
Broadcast radio waves from KPhET. Wiggle the transmitter electron manually or have it oscillate automatically. The strip chart shows the electron positions at the transmitter and at the receiver.