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Sunburn effect (as measured by the UV index) is the product of the sunlight power spectrum (radiation intensity) and the erythemal action spectrum (skin sensitivity) across the range of UV wavelengths. [9] [10] The UV index is a number linearly related to the intensity of sunburn-producing UV radiation at a given point on the Earth's surface.
800-290-4726 more ways to reach us. Sign in. Mail. 24/7 Help. ... Experts explain the purpose of the UV Index Scale and how to stay safe in the sun. ... The indexes range from 0-11 and indicate ...
The first map at right shows levels of UVB radiation in June 2008, expressed in Vitamin D Equivalents. [26] UV map (Vitamin D Equivalents) Using satellite data, measurements from the European Space Agency produce similar maps expressed in units of the widely followed UV Index, for locations around the world. [27]
Sunburn effect (as measured by the UV index) is the product of the sunlight spectrum (radiation intensity) and the erythemal action spectrum (skin sensitivity) across the range of UV wavelengths. Sunburn production per milliwatt of radiation intensity is increased by nearly a factor of 100 between the near UVB wavelengths of 315–295 nm.
Skin damage due to sun exposure is very wavelength dependent over the UV range 295 to 325 nm, with power at the shorter wavelength causing around 30 times as much damage as the longer one. In the calculation of UV Index, a weighting curve is used which is known as the McKinlay-Diffey Erythema action spectrum.
Mettler Toledo developed a single beam array spectrophotometer that allows fast and accurate measurements over the UV-Vis range. The light source consists of a Xenon flash lamp for the ultraviolet (UV) as well as for the visible (VIS) and near-infrared wavelength regions covering a spectral range from 190 up to 1100 nm.
Notes on rangefinders, compasses and on contouring with the Scale of Horizontal Equivalents (PDF), Infantry and Cavalry School Lectures 1902-1910, Staff College Press, U.S. Army, Fort Leavenworth, Kansas, 1905, OCLC 278057724, archived from the original (PDF) on 2016-03-03 – via archive.org
The Planckian locus on the MacAdam (u, v) chromaticity diagram. The normals are lines of equal correlated color temperature. The CIE 1960 color space ("CIE 1960 UCS", variously expanded Uniform Color Space, Uniform Color Scale, Uniform Chromaticity Scale, Uniform Chromaticity Space) is another name for the (u, v) chromaticity space devised by David MacAdam.