Carefully Controlled Wave Interference Patterns
This video illustrates how carefully producing many ripples on the surface of a medium can create desired waves from constructive and destructive interference.
The red ring is an area of minimal wave motion and the green ring is an area of linear wave motion. As the number of red spherical balls (wave sources) increases the ringed areas approach their desired motion. The rigid black bars attached to the wave sources are shown to illustrate the mechanical motion of the sources.
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