Definitions for ultravioletˌʌl trəˈvaɪ ə lɪt

This page provides all possible meanings and translations of the word ultraviolet

Princeton's WordNet

  1. ultraviolet, ultraviolet radiation, ultraviolet light, ultraviolet illumination, UV(adj)

    radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays

  2. ultraviolet(adj)

    having or employing wavelengths shorter than light but longer than X-rays; lying outside the visible spectrum at its violet end

    "ultraviolet radiation"; "an ultraviolet lamp"

Wiktionary

  1. ultraviolet(Noun)

    Ultraviolet colour.

  2. ultraviolet(Adjective)

    of electromagnetic radiation beyond (higher in frequency than) light visible to the human eye; radiation with wavelengths from 380 nanometre - 10 nanometre

Webster Dictionary

  1. Ultraviolet(adj)

    lying outside the visible spectrum at its violet end; -- said of rays more refrangible than the extreme violet rays of the spectrum

Freebase

  1. Ultraviolet

    Ultraviolet light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays, that is, in the range between 400 nm and 10 nm, corresponding to photon energies from 3 eV to 124 eV. It is so-named because the spectrum consists of electromagnetic waves with frequencies higher than those that humans identify as the color violet. These frequencies are invisible to humans, but visible to a number of insects and birds. UV light is found in sunlight and is emitted by electric arcs and specialized lights such as mercury lamps and black lights. It can cause chemical reactions, and causes many substances to glow or fluoresce. A large fraction of UV, including all that reaches the surface of the Earth, is classified as non-ionizing radiation. The higher energies of the ultraviolet spectrum from wavelengths about 10 nm to 120 nm are ionizing, but due to this effect, these wavelengths are absorbed by nitrogen and even more strongly by dioxygen, and thus have an extremely short path length through air. However, the entire spectrum of ultraviolet radiation has some of the biological features of ionizing radiation, in doing far more damage to many molecules in biological systems than is accounted for by simple heating effects. These properties derive from the ultraviolet photon's power to alter chemical bonds in molecules, even without having enough energy to ionize atoms.


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