![]() The Lyman-Alpha Mapping Project (LAMP) onboard the Lunar Reconnaissance Orbiter can peer into permanently shaded craters on the moon by sensing the faint reflections of UV light coming from distant stars. These data enable scientists to estimate the amount of UV radiation reaching the Earth's surface and forecast high-UV-index days for public health awareness. The image above shows the amount of atmospheric ozone in Dobson Units-the common unit for measuring ozone concentration. The Dutch Ozone Monitoring Instrument (OMI) onboard NASA's Aura satellite measures amounts of trace gases important to ozone chemistry and air quality. Each year, a "hole" of thinning atmospheric ozone expands over Antarctica, sometimes extending over populated areas of South America and exposing them to increased levels of harmful UV rays. Blue LED light therapy may destroy acne-causing bacteria ( P. For example, experts believe: Red LED light therapy may reduce inflammation and stimulate the production of collagen, a protein responsible for younger-looking skin that diminishes with age. Longwave lamps produce waves 320-380 nm/ 3200-3800 An. Different LED colors do different things. Shortwave lamps produce waves in the range of 180-280 nanometer (nm)/ 1800-2800 angstroms (An). Their names are based on wavelength: there is longwave black light and shortwave blacklight. This image from NASA's Galaxy Evolution Explorer (GALEX) spacecraft reveals new young stars in the spiral arms of galaxy M81.Ĭhemical processes in the upper atmosphere can affect the amount of atmospheric ozone that shields life at the surface from most of the Sun's harmful UV radiation. There are two types of black light used to examine gemstones. Mace Windu’s purple lightsaber first appeared in Star Wars: Episode II Attack of the Clones and was lost when it fell out a window in Star Wars: Episode III Revenge of the Sith. Scientists can study the formation of stars in ultraviolet since young stars shine most of their light at these wavelengths. The purple lightsaber represents that its user shows an affinity with both the light and dark sides of the Force. Since the Earth's atmosphere absorbs much of the high-energy ultraviolet radiation, scientists use data from satellites positioned above the atmosphere, in orbit around the Earth, to sense UV radiation coming from our Sun and other astronomical objects. ![]() Sure enough, the paper turned black, proving the existence of ultraviolet light. Ultraviolet radiation lies between visible light and X-rays along the electromagnetic spectrum. Knowing that photographic paper would turn black more rapidly in blue light than in red light, he exposed the paper to light beyond violet. Purple and violet light have shorter wavelengths than other colors of light, and ultraviolet has even shorter waves than violet does so ultraviolet is sort of 'purpler-than-purple' light or 'beyond violet' light. When used in conjunction with UV Paint, Black Lights will cause the paint to fluoresce. In 1801, Johann Ritter conducted an experiment to investigate the existence of energy beyond the violet end of the visible spectrum. UV Lights or Black Lights are awesome for parties and Fluro events. Johann Ritter's experiment was designed toexpose photographic paper to light just beyondthe visible spectrum and prove the existenceof light beyond violet-ultraviolet light.Credit: Troy Benesch DISCOVERY OF ULTRAVIOLET ![]()
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