A Ham radio operator will tell you all about the standing wave ratio (SWR) of his antenna, and he may even have a meter in the shack to measure it. He’ll know that a 1.1 to 1 SWR is a good ...

The shive wave machine is a torsional oscillator consisting of many rods attached to a twisting wire. Many aspects of waves can be seen with it, including travelling waves, wave speed, and ...