Search results
Results From The WOW.Com Content Network
The glass envelopes illustrate the dark blue color of Wood's glass, although these modern tubes actually use another optical filtering material. Wood's glass is an optical filter glass invented in 1903 by American physicist Robert Williams Wood (1868–1955), which allows ultraviolet and infrared light to pass through, while blocking most ...
Blacklight fluorescent tubes. The violet glow of a blacklight is not the UV light itself, but visible light that escapes being filtered out by the filter material in the glass envelope. A blacklight, also called a UV-A light, Wood's lamp, or ultraviolet light, is a lamp that emits long-wave ultraviolet light and very little visible light.
The strategy to reduce conduction is the use of Insulated glazing, where two or more panes of glass are used in series, each separated from each other by a space. Double-paned windows are the norm in new residential installations, as they offer substantial energy savings in comparison to single-paned glass.
Optical windows used for UV/VIS spectroscopy, are usually made from glass or fused silica. [5] In IR spectroscopy, there is a wide range of materials that transmit light into the far infrared and can be utilized for the construction of optical windows, from barium fluoride (BaF 2), calcium fluoride, potassium bromide, potassium chloride, sodium chloride, germanium (Ge), zinc selenide (ZnSe ...
AOL latest headlines, news articles on business, entertainment, health and world events.
Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.
Pfund's instrument, allowed the angle of measurement to be varied, but maintained the angle of view to the angle of illumination. Reflected light was measured using a pyrometer lamp as a photometer. The 'glossimeter' was the first to use black glass standards as a basis for reflectance setting.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!