“arc lamp”的意思、由来-百科全书

arc lamp

device for producing light by maintaining an electric arc across a gap between two conductors; light comes from the heated ends of the conductors (usually carbon rods) as well as from the arc itself. Arc lamps are used in applications requiring great brightness, as in searchlights, large film projectors, and floodlights. The term arc lamp is usually restricted to lamps with an air gap between consumable carbon electrodes, but fluorescent and other electric discharge lamps generate light from arcs in gas-filled tubes. Some ultraviolet lamps are of the arc type.

Sir Humphry Davy (Davy, Sir Humphry, Baronet) constructed the first arc lamp (1807), using a battery of 2,000 cells to create a 100-millimetre (4-inch) arc between two charcoal sticks. When suitable electric generators became available in the late 1870s, the practical use of arc lamps began. The Yablochkov candle, an arc lamp invented by the Russian engineer Paul Yablochkov, was used for street lighting in Paris and other European cities from 1878.

词条	arc lamp
释义	arc lamp device for producing light by maintaining an electric arc across a gap between two conductors; light comes from the heated ends of the conductors (usually carbon rods) as well as from the arc itself. Arc lamps are used in applications requiring great brightness, as in searchlights, large film projectors, and floodlights. The term arc lamp is usually restricted to lamps with an air gap between consumable carbon electrodes, but fluorescent and other electric discharge lamps generate light from arcs in gas-filled tubes. Some ultraviolet lamps are of the arc type. Sir Humphry Davy (Davy, Sir Humphry, Baronet) constructed the first arc lamp (1807), using a battery of 2,000 cells to create a 100-millimetre (4-inch) arc between two charcoal sticks. When suitable electric generators became available in the late 1870s, the practical use of arc lamps began. The Yablochkov candle, an arc lamp invented by the Russian engineer Paul Yablochkov, was used for street lighting in Paris and other European cities from 1878.
随便看	Giosuè Carducci Giotto Giotto di Bondone Giovambattista Andreini Giovan Francesco Caroto Giovanni Agnelli Giovanni Alfonso Borelli Giovanni Amendola Giovanni Animuccia Giovanni Arduino Giovanni Bardi, conte di Vernio Giovanni Battista Amici Giovanni Battista Belzoni Giovanni Battista Caprara Giovanni Battista Casti Giovanni Battista Cavalcaselle Giovanni Battista Cima da Conegliano Giovanni Battista Cipriani Giovanni Battista Crespi Giovanni Battista Donati Giovanni Battista Martini Giovanni Battista Morgagni Giovanni Battista Moroni Giovanni Battista Pergolesi Giovanni Battista Piazzetta