![]() Scorpions fluoresce because they contain a fluorescent protein in the hyaline layer of their exoskeleton. Ultraviolet radiation itself is invisible, but illuminating certain materials with UV radiation prompts the visible effects of fluorescence and phosphorescence. A black light is the name commonly given to a lamp emitting almost entirely UV radiation and very little visible light. ![]() The Sun is the primary natural source of UV radiation. Ultraviolet (UV) radiation is defined as that portion of the electromagnetic spectrum between X-rays and visible light. Ultraviolet radiation (also known as UV radiation, UV light or ultraviolet rays) is a form of energy traveling through space.
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