Tuesday, October 28, 2008

Coughs, guns.



There's a really cool NY Times Article on a lab photography technique that is being employed to take photographs of gas leaks, coughs, and things that have invisible effects to the surrounding environment.

The process involves a small, bright light source, precisely placed lenses, a curved mirror, a razor blade that blocks part of the light beam and other tools that make it possible to see and photograph disturbances in the air. In the world of gas dynamics, a cough is merely “a turbulent jet of air with density changes.”

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