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The induction lamp, electrodeless lamp, or electrodeless induction lamp is a gas-discharge lamp in which an electric or magnetic field transfers the power required to generate light from outside the lamp envelope to the gas inside. This is in contrast to a typical gas discharge lamp that uses internal electrodes connected to the power supply by ...
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.
Davy lamp. The Davy lamp is a safety lamp used in flammable atmospheres, invented in 1815 by Sir Humphry Davy. [ 1] It consists of a wick lamp with the flame enclosed inside a mesh screen. It was created for use in coal mines, to reduce the danger of explosions due to the presence of methane and other flammable gases, called firedamp or minedamp.
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The andon is a lamp consisting of paper stretched over a frame of bamboo, wood or metal. [1] The paper protected the flame from the wind. Burning oil in a stone, metal, or ceramic holder, with a wick of cotton or pith, provided the light. They were usually open on the top and bottom, with one side that could be lifted to provide access. [2]
The newly confirmed famine at one of the sprawling camps for war-displaced people in Sudan’s Darfur region is growing uncontrolled as the country's combatants block aid, and it threatens to grow ...
Called 2024 MK, the space rock will make its closest approach to Earth Saturday morning, passing by at about three-quarters the distance from Earth to the moon. A 7,579-foot (2,310-meter) asteroid ...
The Venture 21 is a recreational keelboat, built predominantly of fiberglass, with wood trim. Early production boats had a plywood-cored deck, while later ones were balsa-cored. It has a cutter rig, a spooned raked stem, a slightly angled transom, a transom-hung rudder controlled by a tiller and a swing keel. It displaces 1,500 lb (680 kg) and ...
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