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ultraviolet    音标拼音: [,ʌltrəv'ɑɪəlɪt]
a. 紫外线的

紫外线的

ultraviolet
紫外线 UV

ultraviolet
紫外线

ultraviolet
adj 1: 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"
n 1: radiation lying in the ultraviolet range; wave lengths
shorter than light but longer than X rays [synonym:
{ultraviolet}, {ultraviolet radiation}, {ultraviolet
light}, {ultraviolet illumination}, {UV}]

Ultraviolet \Ul`tra*vi"o*let\, a. [Pref. ultra- violet.]
(Physics)
Lying outside the visible spectrum at its blue-violet end; --
said of light more refrangible (i. e. having a shorter
wavelength) than the extreme violet rays of the visible
spectrum. Electromagnetic radiation with wavelengths shorter
than those of ultrviolet light are not usually considered as
light waves, but are classified differently. The ultraviolet
region of the electromagnetic spectrum is generally
considered as comprising those electromagnetic emissions with
wavelengths lying between those of visible light and those of
X-rays, i. e. between 4000 Angstroms and 100 Angstroms.
[1913 Webster PJC]


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  • Ultraviolet - Wikipedia
    Ultraviolet radiation (UV; sometimes called ultraviolet light) is electromagnetic radiation of wavelengths of 100–400 nanometers, shorter than that of visible light, but longer than X-rays
  • Ultraviolet radiation | Definition, Examples, Effects, Wavelengths . . .
    Ultraviolet radiation is the portion of the electromagnetic spectrum extending from the violet, or short-wavelength, end of the visible light range to the X-ray region
  • Ultraviolet Radiation | Radiation and Your Health | CDC
    Ultraviolet (UV) radiation is a form of non-ionizing radiation that is emitted by the sun and artificial sources, such as tanning beds While it has some benefits for people, including the creation of Vitamin D, it also can cause health risks
  • Ultraviolet Light or UV Radiation - Science Notes and Projects
    Ultraviolet light or UV is electromagnetic radiation in the wavelength range of 10 to 400 nanometers (nm), which is between x-rays and visible light Because it is largely invisible to humans, another name for UV is black light
  • ULTRAVIOLET Definition Meaning - Merriam-Webster
    The meaning of ULTRAVIOLET is situated beyond the visible spectrum at its violet end —used of radiation having a wavelength shorter than wavelengths of visible light and longer than those of X-rays
  • Ultraviolet Radiation: How It Affects Life on Earth
    The article describes some effects on human health, aquatic ecosystems, agricultural plants and other living things, and explains how much ultraviolet radiation we are currently getting and how we measure it
  • Ultraviolet radiation - World Health Organization (WHO)
    Ultraviolet (UV) radiation covers the wavelength range of 100–400 nm, which is a higher frequency and lower wavelength than visible light UV radiation comes naturally from the sun, but it can also be created by artificial sources used in industry, commerce and recreation
  • Where Does Ultraviolet Light Come From and What Is It Used For?
    What is ultraviolet light, and where does it come from? Learn how UV radiation is classified, measured, and used in medicine, manufacturing, astronomy, and daily life, plus how to stay safe
  • UV Light - Stanford Solar Center
    What is Ultraviolet Light? UV (Ultraviolet) Light refers to the region of the electromagnetic spectrum between visible light and X-rays, with a wavelength falling between 400 and 10 nanometers
  • UV Index Overview | US EPA
    The UV Index predicts the ultraviolet radiation levels on a 1-11+ scale and provides a daily forecast of the expected intensity of UV radiation from the sun





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