Monday, 24 September 2012

Sound waves breaking the air | Ernst Mach

Mach was a professor in Prague. He photographed the passage of fast-moving objects clearly showing the sound waves breaking the air in excess of 760 miles per hour. Electrical illumination was triggered when the objects struck wires prior to impacting glass targets, creating a spark effect.

Paul T Burns,

This photo by Ernst Mach was shot in 1888.

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