Dictionary of Human Evolution and Biology

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UV Radiation

Invisible (ultraviolet) region of the spectrum of electromagnetic radiation with wavelengths shorter than those of visible light (about 10-400 nm), i.e. above the violet end, and thus too short to be seen by the human eye. The ultraviolet band extends to the lower limit of the X-ray portion of the spectrum. Other species such as birds and bees can see in the ultraviolet range, and are able to detect morphological patterns in flowers and eggs normally undetectable to humans. UV radiation is divided into three regions: UV-A, UV-B, and UV-C. Aka actinic rays, ultraviolet light.

See melanin, photolysis, rickets, and vitamin D.

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