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Results 1 - 10 of 4987 for  Wikipedia / Light / Wikipedia    (3565152 articles)

Light print that page


Primary properties of light are intensity , propagation direction, frequency or wavelength spectrum , and polarisation , while its speed in a vacuum, 299,792,458 meters per second (about 300,000 kilometers per second), is one of the fundamental constants of nature. Light , which is emitted

Light S.A. print that page

each of these areas is represented by a different company. Currently the controlling stake in Light is CEMIG an electric company based in Belo Horizonte . [ edit ] History Electrical power infrastructure in Rio de Janeiro was originally developed in the first half of the 20th century | 2011/8/5 8:02:13

P.I.Light print that page

On March 2008 Lakeland Records Limited (UK) released the song "Sincerely Stupid". In 2008 P.I Light played Blitzkrieg Metalfest (Georgia), Rock the Borders fest (Armenia), Highland Metalfest (Armenia). [ edit ] Band members Mancho − vocals (2007–present) Jemmi − guitar (2007–present | 2010/9/27 3:30:21

Light field print that page


The light field is a function that describes the amount of light traveling in every direction through every point in space. Michael Faraday was the first to propose (in an 1846 lecture entitled "Thoughts on Ray Vibrations") that light should be interpreted as a field, much like the magnetic

Traffic light print that page


In the typical sequence of coloured lights: Illumination of the green light allows traffic to proceed in the direction denoted, Illumination of the amber/yellow light denoting, if safe to do so, prepare to stop short of the intersection, and Illumination of the red signal prohibits any

Light pollution print that page


The International Dark-Sky Association (IDA) defines light pollution as: Any adverse effect of artificial light including sky glow , glare , light trespass , light clutter , decreased visibility at night, and energy waste. [ 1 ] This approach confuses the cause and its result, however

Light gun print that page


A light gun is a pointing device for computers and a control device for arcade and video games . Modern screen-based light guns work by building a sensor into the gun itself, and the on-screen target(s) emit light rather than the gun. The first device of this type, the light pen

Electric light print that page


Types of electric lighting include: incandescent light bulbs arc lamps gas discharge lamps , e.g., fluorescent lights and compact fluorescent lamps , neon lamps , flood lamps , modern photographic flashes lasers light -emitting diodes , including OLEDs sulfur lamps Different types

Light rail print that page


The term light rail was devised in 1972 by the U.S. Urban Mass Transportation Administration (UMTA) to describe new streetcar transformations that were taking place in Europe and the United States. In Germany the term Stadtbahn (to be distinguished from S-Bahn , which stands for Stadtschnellbahn

Light-emitting diode print that page


A light -emitting diode ( LED ) is a semiconductor light source. [ 1 ] LEDs are used as indicator lamps in many devices and are increasingly used for other lighting . Introduced as a practical electronic component in 1962, [ 2 ] early LEDs emitted low-intensity red light , but modern versions