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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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