This is because objects respond differently to infrared light than they do to visible wavelengths: plants and trees reflect far more, making them appear to glow, while water and skies reflect very little. Infrared images are easily recognised by their radiant white trees and jet-black skies, either in black and white, or with strange colour casts. However, for creative uses, infrared light especially can produce some stunning effects. For conventional photography this can be detrimental, and so manufacturers equip their sensors with UV and infrared filters, to protect against them. Ranging from violet to deep red it occupies wavelengths from around 380 nanometres (nm) to 750nm shorter wavelengths become Ultraviolet, while longer wavelengths are Infrared (IR).Īlthough these extremities of light cannot be seen with a naked eye, they can be picked up by our camera’s sensor. Colour, as we see it, is only a small part of the light spectrum.
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