ultraviolet light
51ultraviolet — [ul΄trə vī′ə lit] adj. 1. pertaining to a band of electromagnetic radiation having wavelengths (from c. 5 to c. 400 nanometers) that are shorter than violet light 2. of, pertaining to, or producing radiation of such wavelengths n. ultraviolet… …
52ultraviolet rays — ultraviolet rays, the invisible rays in the part of the spectrum beyond the violet. They are present in sunlight and light from sun lamps, and are used for healing, forming vitamins, and as sterilizers and disinfectants. Ultraviolet rays are more …
53Ultraviolet disinfection — is a form of wastewater treatment. It is commonly used in garden pond filtration systems to kill algae. Large scale urban UV wastewater treatment is performed in cities such as Edmonton, Alberta.UV DosingOne method for gauging UV effectiveness is …
54ultraviolet — ► NOUN ▪ electromagnetic radiation having a wavelength just shorter than that of violet light but longer than that of X rays. ► ADJECTIVE ▪ denoting such radiation …
55Ultraviolet–visible spectroscopy — Beckman DU640 UV/Vis spectrophotometer. Ultraviolet visible spectroscopy or ultraviolet visible spectrophotometry (UV Vis or UV/Vis) refers to absorption spectroscopy or reflectance spectroscopy in the ultraviolet visible spectral region. This… …
56ultraviolet radiation — Portion of the electromagnetic spectrum extending from the violet end of visible light to the X ray region. Ultraviolet (UV) radiation lies between wavelengths of about 400 nanometres and 10 nanometres, corresponding to frequencies of… …
57Light — For other uses, see Light (disambiguation). Visible light redirects here. For other uses, see Visible light (disambiguation) …
58Ultraviolet (film) — Infobox Film name = UltraViolet caption = Promotional poster for the film UltraViolet director = Kurt Wimmer writer = Kurt Wimmer starring = Milla Jovovich Cameron Bright Nick Chinlund producer = John Baldecchi Lucas Foster Tony Mark (Executive)… …
59light — That portion of electromagnetic radiation (between 390 and 770 nm) to which the retina is sensitive (wavelength range of 380–780 nm). SEE ALSO: lamp. [A.S. leoht] cold l. 1. SYN: bioluminescence (1). 2. fluorescent l. as opposed to incandescent l …
60ultraviolet — or UV The light whose wavelength (about 380 nanometers) is just long enough not to be x rays, but just enough shorter than violet light so that it is not visible to the human eye. Ultraviolet is also known by the short form of UV. It is… …
