Harmonograph | Light

A series of long exposure photographs of a light on the end of a freely oscillating pendulum.

The pendulum’s centre of gravity is slightly off-centre, meaning that the x and y components of its movement oscillate at very slightly different frequencies; the harmonic relationship between these frequencies causes remains constant as the amplitude decreases due to friction between the pendulum and the air.

This set up is the most simple form of a harmonograph.

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For more infomation please visit www.dandodds.co.uk

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