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- Ultraviolet abstract "Ultraviolet (UV) light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays, that is, in the range between 400 nm and 100 nm, corresponding to photon energies from 3 eV to 124 eV. It is so-named because the spectrum consists of electromagnetic waves with frequencies higher than those that humans identify as the color violet. These frequencies are invisible to most humans except those with aphakia. Near-UV is visible to a number of insects and birds.UV light is found in sunlight and is emitted by electric arcs and specialized lights such as mercury lamps and black lights. It can cause chemical reactions, and causes many substances to glow or fluoresce. A large fraction of UV, including all that reaches the surface of the Earth, is classified as non-ionizing radiation. The higher energies of the ultraviolet spectrum from wavelengths about 120 nm to 10 nm ('extreme' ultraviolet) are ionizing, but, due to this effect, these wavelengths are absorbed by nitrogen and even more strongly by dioxygen, and thus have an extremely short path length through air. However, the entire spectrum of ultraviolet radiation has some of the biological features of ionizing radiation: It does far more damage to many molecules in biological systems than is accounted for by simple heating effects (an example is sunburn). These properties derive from the ultraviolet photon's power to alter chemical bonds in molecules, even without having enough energy to ionize atoms.Although ultraviolet radiation is invisible to the human eye, most people are aware of the effect it has on the skin of fair-skinned people, i.e., the suntan and sunburn. Normal human skin responds to exposure to small doses of this kind of radiation by increasing the amount of protective melanin in the skin's outer layers; too much of this radiation in too short a period of time, however, results in cellular damage from radiation burn. In fact, the damaging effects of short-wavelength and mid-wavelength UV means that life on Earth outside of the deep oceans is possible only because the atmosphere, primarily the ozone layer, filters out the vast majority of this light. A small amount of the shorter wavelength ultraviolet reaches the surface, which causes sunburn, long-term skin damage, and skin cancer. Ultraviolet is also responsible for the formation of vitamin D in organisms that make this vitamin (including humans). The UV spectrum thus has many effects, both beneficial and damaging, to human health.".
- Ultraviolet thumbnail UV-handlamp_hg.jpg?width=300.
- Ultraviolet wikiPageExternalLink article.aspx?articleid=480678.
- Ultraviolet wikiPageExternalLink UVB.
- Ultraviolet wikiPageExternalLink scholar?hl=en&lr=&q=author%3AHockberger+intitle%3AA+History+of+Ultraviolet+Photobiology+for+Humans%2C+Animals+and+Microorganisms&as_publication=Photochemisty+and+Photobiology&as_ylo=2002&as_yhi=2002&btnG=Search.
- Ultraviolet wikiPageExternalLink 0031-8655(2002)076%3C0561%3AAHOUPF%3E2.0.CO%3B2.
- Ultraviolet wikiPageID "31990".
- Ultraviolet wikiPageRevisionID "606654959".
- Ultraviolet align "right".
- Ultraviolet caption "9".
- Ultraviolet caption "Commercial germicidal lamp in butcher shop".
- Ultraviolet date "January 2014".
- Ultraviolet direction "vertical".
- Ultraviolet expiry "2014-05-11".
- Ultraviolet footer "Two black light fluorescent tubes, showing use. The top is a F15T8/BLB 18 inch, 15 watt tube, used in a standard plug-in fluorescent fixture. The bottom is an F8T5/BLB 12 inch, 8 watt tube, used in a portable battery-powered black light sold as a pet urine detector.".
- Ultraviolet hasPhotoCollection Ultraviolet.
- Ultraviolet image "Germicidal Lamp 1.jpg".
- Ultraviolet image "Two black light fluorescent tubes.jpg".
- Ultraviolet image "Two black light lamps.jpg".
- Ultraviolet image "Кварцевая лампа.JPG".
- Ultraviolet reason "intensity on the ultraviolet index differs, for latitude, altitude, time of the day and the year".
- Ultraviolet small "yes".
- Ultraviolet width "200".
- Ultraviolet subject Category:Electromagnetic_spectrum.
- Ultraviolet subject Category:Ultraviolet_radiation.
- Ultraviolet comment "Ultraviolet (UV) light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays, that is, in the range between 400 nm and 100 nm, corresponding to photon energies from 3 eV to 124 eV. It is so-named because the spectrum consists of electromagnetic waves with frequencies higher than those that humans identify as the color violet. These frequencies are invisible to most humans except those with aphakia.".
- Ultraviolet label "Radiación ultravioleta".
- Ultraviolet label "Radiazione ultravioletta".
- Ultraviolet label "Radiação ultravioleta".
- Ultraviolet label "Ultrafiolet".
- Ultraviolet label "Ultraviolet".
- Ultraviolet label "Ultraviolet".
- Ultraviolet label "Ultraviolet".
- Ultraviolet label "Ultraviolettstrahlung".
- Ultraviolet label "Ультрафиолетовое излучение".
- Ultraviolet label "أشعة فوق بنفسجية".
- Ultraviolet label "紫外線".
- Ultraviolet label "紫外线".
- Ultraviolet sameAs Ultrafialové_záření.
- Ultraviolet sameAs Ultraviolettstrahlung.
- Ultraviolet sameAs Υπεριώδης_ακτινοβολία.
- Ultraviolet sameAs Radiación_ultravioleta.
- Ultraviolet sameAs Ultramore.
- Ultraviolet sameAs Ultraviolet.
- Ultraviolet sameAs Ultraungu.
- Ultraviolet sameAs Radiazione_ultravioletta.
- Ultraviolet sameAs 紫外線.
- Ultraviolet sameAs 자외선.
- Ultraviolet sameAs Ultraviolet.
- Ultraviolet sameAs Ultrafiolet.
- Ultraviolet sameAs Radiação_ultravioleta.
- Ultraviolet sameAs m.07vvp.
- Ultraviolet sameAs Q11391.
- Ultraviolet sameAs Q11391.
- Ultraviolet wasDerivedFrom Ultraviolet?oldid=606654959.
- Ultraviolet depiction UV-handlamp_hg.jpg.
- Ultraviolet isPrimaryTopicOf Ultraviolet.