mercury discharge lamp
61electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …
62Street light — A street light, lamppost, street lamp, light standard or lamp standard, is a raised source of light on the edge of a road, turned on or lit at a certain time every night. Modern lamps may also have light sensitive photocells to turn them on at… …
63optical ceramics — Introduction advanced industrial materials developed for use in optical applications. Optical materials derive their utility from their response to infrared, optical, and ultraviolet light. The most obvious optical materials are… …
64Peter Cooper Hewitt — Infobox Scientist name = Peter Cooper Hewitt box width = image width =150px caption = Peter Cooper Hewitt birth date = May 5, 1861 birth place = New York City death date = August 25, 1921 death place = residence = citizenship = nationality =… …
65Weather testing of polymers — is the controlled polymer degradation and polymer coating degradation under lab or natural conditions.Just like errosion of rocks, natural phenomena can cause degratation in polymer systems. The elements of most concern to polymers are… …
66List of light sources — This is a list of sources of light, including both natural and artificial sources, and both processes and devices .Natural [ Lightning can be a spectacular source of illumination.] *Astronomical objects **Sunlight (Solar radiation)… …
67Geissler tube — The Geissler tube is a glass tube for demonstrating the principles of electrical glow discharge. The tube was invented by the German physicist and glassblower Heinrich Geissler in 1857. The Geissler tube was an evacuated glass cylinder with an… …
68Hewitt, Peter Cooper — ▪ American electrical engineer born May 5, 1861, New York, N.Y., U.S. died Aug. 25, 1921, Paris, France American electrical engineer who invented the mercury vapour lamp (mercury lamp), a great advance in electrical lighting. At an… …
69Street light interference — Street light interference, or SLI, is an alleged anomalous phenomenon where a person seems to turn off (or sometimes on) street lights, or outside building security lights, when passing near them.Although street lights sometimes turn on and off… …
70light source — Synonyms and related words: Chinese lantern, Finsen light, Moore light, arc light, battery lamp, benzine, broadside, candle, candlelight, coal oil, cresset, dark lantern, electric candle, electric lamp, electric torch, electric arc lamp, electric …
