Mechanical model to show circular polarization; hand-cranked.

Mechanical model to show circular polarization; hand-cranked. End view of model shows helical nature of wave. This frame slides up and down to vary the helical behavior. Cranking the handle clockwise causes a circular wave to spiral to the right. Note: Same set-up as X.
UCB Index: 
E+45+75
Demo Diagram: 

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