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Harmonogram

Harmonogram

A400/0063

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Credit

ADAM HART-DAVIS / SCIENCE PHOTO LIBRARY ADAM HART-DAVIS / SCIENCE PHOTO LIBRARY

Caption

Harmonogram. This unique pattern was created using a device called a two-pendulum harmonograph. This piece of equipment consists of two pendulums, each suspended from a universal joint, with one pendulum hanging lower than the other. In this case, the higher pendulum had a camera attached to its base, while the lower pendulum had an LED that pointed up at the camera when at rest. In a blacked-out area, both pendulums were set swinging. The camera shutter was opened before the LED was switched on. After about a minute, the LED was switched off and the camera shutter closed. Harmonographs were pioneered by the French physicist, Jules Antoine Lissajous in 1857.

Release details

Model release not required. Property release not required.

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