29 October 2008

Visualizing Airflow ~ Lovely & Shocking Schlierens!

The NYTimes Science section has a cool article The Mysterious Cough, Caught on Film -- plus a nice slideshow -- about Professor Gary Settles and his colleagues at Penn State who use the Schlieren effect to photograph fluids of different densities, for instance pressured air from a sneeze or the shock waves surrounding bullets, like this...

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