Schlieren image of a man breathing through his nose

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A schlieren image of a a man breathing through his nose.  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 nose. 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: K07Sch0282.jpg
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