EDWARD KINSMAN / SCIENCE PHOTO LIBRARY EDWARD KINSMAN / SCIENCE PHOTO LIBRARY
Infrared shows a gun hidden inside a black plastic garbage bag. The different colours represent different temperatures. The lightest colours are the hottest temperatures, while the darker colours represent cooler temperatures. 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) to create an image that represents an objects temperature. This image is part of a series. The comparison of images in the series illustrates how infrared light can be used to reveal the presence of objects that go unseen in visible light.
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