O2-23
Demonstrate stroboscopic effects.
Several 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. Some are motional things like a swinging pendulum, shown in the photograph above. Another is actually the demonstration O2-21: STROBOSCOPIC CENCO, a shameless advertising ploy.
N3, O2, LS1