ultraviolet light
41ultraviolet B — /ʌltrəˌvaɪələt ˈbi/ (say ultruh.vuyuhluht bee) noun a form of ultraviolet light which causes sunburn of the skin and which can damage the cornea and lens of the eye. Abbrev.: UVB Compare ultraviolet A …
42ultraviolet steriliser — an aquarium device that sterilises water by passing it through a glass tube around an ultraviolet light. Useful in removing bacteria, algal spores and parasites …
43ultraviolet spectrometer — A device which produces a spectrum of ultraviolet light and is provided with a calibrated scale for measurement of wavelength …
44ultraviolet — /ʌltrəˈvaɪələt / (say ultruh vuyuhluht), / ˈvaɪlət/ (say vuyluht) noun 1. the part of the electromagnetic spectrum beyond the violet, with wavelengths shorter than the violet end of the visible spectrum. –adjective 2. relating to these rays:… …
45Ultraviolet-visible spectroscopy — or ultraviolet visible spectrophotometry (UV/ VIS) involves the spectroscopy of photons in the UV visible region. It uses light in the visible and adjacent near ultraviolet (UV) and near infrared (NIR) ranges. In this region of the… …
46Ultraviolet photoelectron spectroscopy — (UPS) refers to the measurement of kinetic energy spectra of photoelectrons emitted by ultraviolet photons, to determine molecular energy levels in the valence region.If Einstein’s photoelectric law is applied to a free molecule, the kinetic… …
47Ultraviolet — 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.… …
48ultraviolet examination — Ultraviolet radiation is invisible and occurs in the wavelengths just below the visible blue violet end of the spectrum. The invisible rays react on some substances so that visible light is emitted, a phenomenon known as ultraviolet… …
49light — light1 [līt] n. [ME liht < OE lēoht, akin to Ger licht < IE base * leuk , to shine, bright > Gr leukos, white, L lux & lumen, light, lucere, to shine, luna, moon, Welsh llug, gleam] 1. a) the form of electromagnetic radiation that acts… …
50Ultraviolet-sensitive bead — Ultraviolet sensitive beads were developed to react to ultraviolet rays, from the Sun or artificial sources. These beads are white or transparent when they re not exposed to UV rays. They do not react with visible light. When exposed to UV rays,… …
