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Ultraviolet light is a form of electromagnetic radiation that ranges in wavelengths from 10 nm to 400 nm. [6] This wavelength is shorter than visible light but longer than X-rays. [6] As it sits on the lower edge of visible light, is what gives its name. The most effective wavelength of UV light is approximately 250 nm. [6]
English: A linear representation of the visible light spectrum. Colour ranges were taken from 'CRC Handbook of Fundamental Spectroscopic Correlation Charts' (see w:Visible spectrum). Spectral XYZ locus coordinates were found here. Every 10nm, the spectral locus point was used as the initial point in a search for a matching sRGB colour (assuming ...
The spectrum appears only when these edges are close enough to overlap. In the early 19th century, the concept of the visible spectrum became more definite, as light outside the visible range was discovered and characterized by William Herschel and Johann Wilhelm Ritter (ultraviolet), Thomas Young, Thomas Johann Seebeck, and others. [17]
This image is a derivative work of the following images: File:Light_spectrum.png licensed with Cc-by-sa-3.0-migrated, GFDL, GFDL-en, GFDL-self-en 2008-03-11T08:51:05Z Rrostrom 327x440 (30985 Bytes) Update of original upload. Some of the unit prefixes in the wavelength column were wrong.
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By definition, visible light is the part of the EM spectrum the human eye is the most sensitive to. Visible light (and near-infrared light) is typically absorbed and emitted by electrons in molecules and atoms that move from one energy level to another. This action allows the chemical mechanisms that underlie human vision and plant photosynthesis.
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Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."