MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY
Thermograph. Firefighter using a thermograph to investigate a car. A thermograph comprises an infra-red camera that produces a thermogram, a temperature map of the surface of an object. All objects emit infra-red, which is generated by the movement of atoms and molecules. The greater the temperature, the greater the movement and the more infra-red that is emitted. See T664/215 for a thermographic image of the car.
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