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Medical experts advise the public on the importance of wearing sunglasses to protect the eyes from UV; [26] for adequate protection, experts recommend sunglasses that reflect or filter out 99% or more of UVA and UVB light, with wavelengths up to 400 nm. Sunglasses that meet this requirement are often labeled as "UV400".
UVA 315–400 Ultraviolet B 3.94–4.43 0.631–0.710 Medium-wave UV, mostly absorbed by the ozone layer: intermediate UV; Dorno radiation. UVB 280–315 Ultraviolet C 4.43–12.4 0.710–1.987 Short-wave UV, germicidal UV, ionizing radiation at shorter wavelengths, completely absorbed by the ozone layer and atmosphere: hard UV. UVC 100–280
UV swimwear. Sun protective clothing is clothing specifically designed for sun protection and is produced from a fabric rated for its level of ultraviolet (UV) protection. A novel weave structure and denier (related to thread count per inch) may produce sun protective properties.
This page was last edited on 7 November 2023, at 09:39 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Polarized sunglasses use a sheet of polarizing material to block horizontally-polarized light and thus reduce glare in such situations. These are most effective with smooth surfaces where specular reflection (thus from light whose angle of incidence is the same as the angle of reflection defined by the angle observed from) is dominant, but even ...
100% Sources: Invisible Institute , City of Chicago, Census Bureau, CNN, Chicago Police Department The recent release of video footage showing Van Dyke shooting and killing 17-year-old Laquan McDonald has focused new attention on long-simmering complaints by black Chicagoans about police brutality, and a system that does not allow them a real ...
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