A mechanical instrument that creates visual patterns by combining multiple periodic motions, used to show how harmonic oscillations interact.
From harmono- (combining form from harmony) + -graph suffix meaning 'to write or record' (from Greek graphein). The instrument was invented in the 1800s to visually demonstrate harmonic motion and interference.
Harmonographs are mesmerizing machines—they look like elaborate Rube Goldberg devices with pendulums, but they create stunningly beautiful symmetrical patterns by combining simple repetitive motions. Modern artists still use digital versions because the patterns are so hypnotic and mathematically complex.
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