T-SERVICE / SCIENCE PHOTO LIBRARY T-SERVICE / SCIENCE PHOTO LIBRARY
Hot drink. Thermogram of a hot drink held by cupped hands. A thermogram shows 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 dark blue (coldest, 12 degrees Celsius), through green and yellow to light red (hottest, 50 degrees Celsius).
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