Ultraviolet (UV) Radiation

Ultraviolet (UV) Radiation

In pollution control applications, ultraviolet analyzers are used to detect emissions of nitrogen oxides, sulfur compounds, mercury, and ammonia, for example in the flue gas of fossil-fired power plants. Scientific instruments can therefore utilize this spectral range by operating in an oxygen-free atmosphere commonly pure nitrogen , without the need for costly vacuum chambers.

Archived from the original on 25 September Archived from the original on 20 September Suspended nanoparticles in stained glass prevent UV rays from causing chemical reactions that change image colors. Fortunately, the ozone layer in the Earth's atmosphere screens us from most of the UV given off by the Sun. Steps may then be taken to "etch" away, deposit on or otherwise modify areas of the sample where no photoresist remains.

UV degradation is one form of polymer degradation that affects plastics exposed to sunlight. International Journal of Circumpolar Health.

Ultra Violet

Sometimes these internal filters can be removed, or they may be absent, and an external visible-light filter prepares the camera for near-UV photography.

International Journal of Cancer. Because of its ability to cause chemical reactions and excite fluorescence in materials, ultraviolet radiation has a number of applications. The word "ultraviolet" means "beyond violet". Ultra-Violet light is made by special lamps , for example, on sun beds.

Other applications include the authentication of various collectibles and art, and detecting counterfeit currency. UV Guide UK.


The evolution of early reproductive proteins and enzymes is attributed in modern models of evolutionary theory to ultraviolet radiation.

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Technology for VUV instrumentation was largely driven by solar astronomy for many decades. Certain inks, coatings, and adhesives are formulated with photoinitiators and resins. Int J Pharm. Mervin; Ott, William R.

Ultraviolet Waves

Archived from the original on 4 March UVB radiation excites DNA molecules in skin cells, causing aberrant covalent bonds to form between adjacent pyrimidine bases, producing a dimer. Lawrence Livermore National Laboratory. Archived PDF from the original on 1 November The part of the Earth facing the Sun reflects much UV light.