The 19th-Century Photography Trick Makes The Invisible Visible [Video]

The 19th-Century Photography Trick Makes The Invisible Visible [Video]
Innovation

Ever wonder what sound looks like?

Lara Piras
  • 11 april 2014

German physicist August Toepler founded a photography technique that dates back to the mid-19th century. This technique known as the Schlieren Flow Visualization enables the photographer to visually capture the changes in air density.

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