T-SERVICE / SCIENCE PHOTO LIBRARY T-SERVICE / SCIENCE PHOTO LIBRARY
Man cooling down. Thermogram of a man with a cool towel lain over his lowered head. A thermogram shows the variation in temperature on the surface of an object, measured by the long-wave infrared radiation it emits. The temperature scale is colour-coded and runs from blue (coldest), through green yellow and orange to red (warmest).
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