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Archived PDF from the original on 11 June UV radiation is also produced by electric arcs. The technique involves taking pictures of the illegible document using different filters in the infrared or ultraviolet range, finely tuned to capture certain wavelengths of light. A burning hydrogen flame, for instance, radiates strongly in the to nanometer range and only very weakly in the IR region, whereas a coal fire emits very weakly in the UV band yet very strongly at IR wavelengths. thus, a fire detector that operates using both UV and IR detectors is more reliable than one with a UV detector alone. Archived from the original on 27 January Light-emitting diodes LEDs can be manufactured to emit radiation in the ultraviolet range. Retrieved 27 November Ultraviolet lamps are used to sterilize workspaces and tools used in biology laboratories and medical facilities. Arctic females are the brightest. Archived from the original on 17 March Short-wave ultraviolet radiation can destroy DNA in living microorganisms. Since microorganisms can be shielded from ultraviolet rays in small cracks and other shaded areas, these lamps are used only as a supplement to other sterilization techniques. Archived from the original on 24 October Retrieved 12 October

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Ultraviolet (UV) designates a band of the electromagnetic spectrum with wavelength from 10 . Ultraviolet absorbers are molecules used in organic materials (polymers, .. The study indicates that sunscreen must be reapplied within 2 hours in order to prevent UV light from penetrating to sunscreen-infused live skin cells.

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Description: Views Read Edit View history. In other projects Wikimedia Commons. In humans, excessive exposure to UV radiation can result in acute and chronic harmful effects on the eye's dioptric system and retina. Archived from the original on 20 August The risk is elevated at high altitudes and people living in high latitude countries where snow covers the ground right into early summer and sun positions even at zenith are low, are particularly at risk. Electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays. For example, in the Colias eurytheme butterfly, males rely on visual cues to locate and identify females. Archived PDF from the original on 11 June Extremely hot stars emit proportionally more UV radiation than the Sun. Ultraviolet lamps are used to sterilize workspaces and tools used in biology laboratories and medical facilities. Archived from the original on 29 October
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