- Stock Photography: LOOK AT THE BACK, IN THE RAIN, STILL WITH ALERTNESS TO PROTECT ITS TERRITORY. by Cmwangca
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- Photo title: Look at the back, in the rain, still with alertness to protect its territory.
- Author: Cmwangca
- Cover photo description:
- The brilliant, iridescent colors of hummingbird plumage are caused by the refraction of incident light by the structures of certain feathers. Like any diffraction grating or prism, these structures split light into its component colors, and only certain frequencies are refracted back to the viewer. The apparent color of any particular part of a feather depends upon the distance between the microscopic ridges in its gridlike structure. The resulting colors are much more vivid and iridescent than those of birds with only pigmented feathers.
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