PURPOSE: Demonstrate stroboscopic effects.
DESCRIPTION: A bunch of stroboscopic discs are available with a high-speed rotator and stroboscope. Look them over to find what interests you. Some are similar to the patterns seen on the obsolete stroboscopic piano tuners (or maybe they aren' t obsolete). Some are motional things like a swinging pendulum. The one shown in the photograph is actually the demonstration O2-21: STROBOSCOPIC CENCO, a shameless advertising ploy.
REFERENCES: (PIRA unknown.)
EQUIPMENT: Stroboscope, stroboscopic discs with fast rotator.
SETUP TIME: None.
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