[Physics]
Revealing Covert Actions: Updated technologies expose air's unseen eruptions
The recent merger of high-speed video technology and centuries-old
techniques for seeing ordinarily invisible fluctuations of the air
is enabling engineers to visualize and study the previously unseen,
large-scale behavior of shock waves in explosions and aerodynamics
research.
http://www.sciencenews.org/articles/20060408/bob9.asp
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