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Historians Robert Friedel and Paul Israel list inventors of incandescent lamps prior to Joseph Swan and Thomas Edison of General Electric. [4]: 91–93 They conclude that Edison's version was the first practical implementation, able to outstrip the others because of a combination of four factors: an effective incandescent material; a vacuum higher than other implementations which was achieved ...
A halogen lamp (also called tungsten halogen, quartz-halogen, and quartz iodine lamp) is an incandescent lamp consisting of a tungsten filament sealed in a compact transparent envelope that is filled with a mixture of an inert gas and a small amount of a halogen, such as iodine or bromine. The combination of the halogen gas and the tungsten ...
The flat bottom surfaces of the anvil and post embedded inside the epoxy act as anchors, to prevent the conductors from being forcefully pulled out via mechanical strain or vibration. A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron ...
The United States government will resume an updated version of a migrant sponsorship program that it had paused earlier this summer over concerns of fraud, the U.S. Department of Homeland Security ...
September 6, 2024 at 3:45 PM. WINDER, Georgia – A crocheted child's doll. Tear-soaked tissues. Clasped fingers. More than a dozen family members and victims sat as silent but emotional witnesses ...
Princess Diana has officially been gone for 27 years, and her brother is among those who are commemorating the impact she left behind on the world.. Charles Spencer, the youngest of Diana's ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 10 September 2024. American multinational home improvement supplies retailing company The Home Depot, Inc. Company type Public Traded as NYSE: HD DJIA component S&P 100 component S&P 500 component Industry Retail (home improvement) Founded February 6, 1978 ; 46 years ago (1978-02-06) in Marietta, Georgia ...
A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the lamp to glow.
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