PURPOSE: To show Lissajous figures created by music to form a laser show.
DESCRIPTION: A front-surface mirror is suspended in front of the center of a large loudspeaker in an orthogonal suspension. A laser beam bounces off the mirror onto a nearby white screen, creating varying Lissajous patterns as the music plays. This suspension encourages the mirror to move with two basically orthogonal oscillations.
REFERENCES: (PIRA 3A80.41)
EQUIPMENT: Audio system, mirror with mount, laser, and audiocassette.
SETUP TIME: 5 min.
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