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A schlieren image of a a man breathing through his mouth.  The schlieren images identifies areas of different temperature by using the change in the index of refraction of a fluid due to a change in temperature.
A schlieren image of a a man breathing through his mouth. The schlieren images identifies areas of different temperature by using the change in the index of refraction of a fluid due to a change in temperature.
Filename: K07Sch0285.jpg
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