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Concept: laser in the concept vocabulary
| Concept URI | http://www.eionet.europa.eu/gemet/concept/4698 |
|---|---|
| Preferred label | laser |
| Definition | 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. |
| Notation | |
| Status | Valid |
| Status Modified | 2013-12-05 |
| Accepted Date | 2013-12-05 |
| Not Accepted Date | |
| Has broader | |
| Has exact match | |
| Has close match | |
| Source |
European Environment Agency
Kgs. Nytorv 6, DK-1050 Copenhagen K, Denmark