ontologies
GEMET
GEneral Multilingual Environmental Thesaurus (GEMET) SKOS View license
Last submission date January 17, 2022
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ID http://www.eionet.europa.eu/gemet/concept/4698
http://www.eionet.europa.eu/gemet/concept/4698
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Preferred name

laser

Definitions

Acronym for Light Amplification by Stimulated Emission of Radiation; a device that produces a powerful, highly directional, monochromatic, coherent beam of light. Laser consist of a transparent cylinder with a reflecting surface at one end and a partially reflecting surface at the other. Light waves are reflected back and forth, some of them emerging at the partially reflecting end. The light source may be a ruby, whose chromium atoms are excited by a flash lamp so that they emit pulses of highly coherent light, or a mixture of inert gases that produce a continuos beam, or a cube of treated gallium arsenide which emits infrared radiation when an electric current passes through it.

Member of http://www.eionet.europa.eu/gemet/theme/28 http://www.eionet.europa.eu/gemet/group/6237
In schemes http://www.eionet.europa.eu/gemet/gemetThesaurus
Type http://www.w3.org/2004/02/skos/core#Concept
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