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Wave Pulse on a Spring

Someone whipping a spring up and down

PIRA 3B10.10

A long spring is used to show wave pulses. One end of the spring can be attached to a fixed point and wave pulses shown. To show waves moving through each other or interference, have a student hold the other end of the spring and make up pulses while the instructor makes either an up or a down pulse, depending on what is desired to be shown.