- low - pressure vapour sodium lamp
- مِصْباحُ بخارِ الصّوديوم مُنْخَفض الضّغْط
English-Arabic engineering terms dictionary. 2015.
low - pressure vapour sodium lamp
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sodium — /soh dee euhm/, n. 1. Chem. a soft, silver white, metallic element that oxidizes rapidly in moist air, occurring in nature only in the combined state, and used in the synthesis of sodium peroxide, sodium cyanide, and tetraethyllead: a necessary… … Universalium
sodium-vapour lamp — ▪ instrument electric discharge lamp using ionized sodium, used for street lighting and other illumination. A low pressure sodium vapour lamp consists of a glass shell with metal electrodes, filled with neon gas and a little sodium. When… … Universalium
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rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 … Universalium
Street 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… … Wikipedia
