Combination thermogram-visible light image of a boy.  This image is made from two images:  A normal visible light image and a far infrared image.  The different colors represent different temperatures on the object. The lightest colors are the hottest temperatures, while the darker colors represent a cooler temperature.  Thermography uses special cameras that can detect light in the far-infrared range of the electromagnetic spectrum (900?14,000 nanometers or 0.9?14 µm) and creates an  image of the objects temperature.
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