Infrared light is beyond the visible spectrum, ranging from 700 to 1000 nanometers. The images in these galleries were made by using a dark, technical filter which blocks all visible light but allows light above 700 nm to pass through. Specially sensitized film or digital cameras employing sensors capable of recording infrared wavelengths can capture images such as these. These images were originally in color, in a range of pale red and violet hues.
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