29 May '11, 1am

The Reindeer Superpower: Ultraviolet Vision

The Reindeer Superpower: Ultraviolet Vision

Perhaps reindeer do not really fly, but they do have one super power: ultraviolet vision! Not to be confused with Superman's X-ray vision, a reindeer's eye does not emit UV (ultraviolet) rays; but it does see in UV light. What is Ultraviolet Light? Photo: RukaKuusamo.com Ultraviolet light simply is light, but with a wavelength shorter than the blue, indigo or violet that humans can see. UV light can give a person a tan, or sunburn; it triggers the production of Vitamin D. Can People See in Ultraviolet Light? Photo: timo_w2s No, human eyes see red through indigo or violet, in wavelengths from approximately 700nm (nano-metres) for red down to 400nm (violet). In fact, the cornea of the human eye blocks most UV light; presumably this protects the retina. People without eye protection in bright snowy areas can suffer temporary "snow blindness" because the cornea clouds over. Th...

Full article: http://www.environmentalgraffiti.com/animals/news-reindee...

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