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Diathermancy

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thumb|upright=1.4|The Amazon River delta showing no clouds above river waters because water is not a diathermanous fluid.

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Diathermancy
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  • Atmospheric heating from oceanic waters
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thumb|upright=1.4|The Amazon River delta showing no clouds above river waters because water is not a diathermanous fluid.

Diathermancy (from "dia" through and "thermē" heat) is the property of some fluids that allows rays of light through them without itself being heated. A diathermanous substance is thus "permeable" by heat. Diathermancy was first described by German physicist and chemist Heinrich Gustav Magnus in the 1800s.

Excerpted from Wikipedia’s “Diathermancy” article, available under the CC BY-SA 4.0 licence.

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