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UV light is electromagnetic radiation with wavelengths shorter than visible light but longer than X-rays. UV is categorised into several wavelength ranges, with short-wavelength UV (UV-C) considered "germicidal UV". Wavelengths between about 200 nm and 300 nm are strongly absorbed by nucleic acids.
The maximal allowed cw-powers for the laser classes 1, 2, 3R and 3B according to the standard EN 60825-1:2007. Note that these values hold only for static, point-like laser sources (i.e. collimated or weakly divergent laser beams). Lasers have been classified by wavelength and power [18] into four classes and a few subclasses since the early ...
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.
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A UV coating (or more generally a radiation cured coating) is a surface treatment which either is cured by ultraviolet radiation, or which protects the underlying ...
Extreme ultraviolet composite image of the Sun (red: 21.1 nm, green: 19.3 nm, blue: 17.1 nm) taken by the Solar Dynamics Observatory on August 1, 2010 13.5 nm extreme ultraviolet light is used commercially for photolithography as part of the semiconductor fabrication process.
The pre-Christmas buzz and serene sense of safety at a Wisconsin private school were shattered when a student pulled out a gun and opened fire – killing two people, wounding six others and ...
Remember the four P's when dealing with cold: Pets, Pipes, Plants and People (elderly and young). Bring pets inside and make sure they have plenty of food and water as well.