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laser    音标拼音: [l'ezɚ]
n. 激光

镭射

laser
雷射

laser
雷射

laser
n 1: an acronym for light amplification by stimulated emission
of radiation; an optical device that produces an intense
monochromatic beam of coherent light [synonym: {laser},
{optical maser}]

laser \laser\ n. [acronym from Light Amplification by Stimulated
Emission of Radiation: ca. 1955.]
A device which produces an intense, usually narrow,
monochromatic beam of coherent light; called also {optical
maser}. It has various forms, and is used in various
applications in science and technology. The beam is produced
by boosting the majority of the electrons in specific
radiation-absorbing atoms in a medium into a higher energy
level, from which they are stimulated by their own emitted
radiation to drop back synchronously to their lower energy
level, and emit light which is in phase (coherent).

Syn: optical maser.
[WordNet 1.5]

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  • Laser - Wikipedia
    A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation
  • Laser | Definition, Acronym, Principle, Applications, Types | Britannica
    laser, a device that stimulates atoms or molecules to emit light at particular wavelengths and amplifies that light, typically producing a very narrow beam of radiation The emission generally covers an extremely limited range of visible, infrared, or ultraviolet wavelengths
  • LASER Definition Meaning - Merriam-Webster
    The meaning of LASER is a device that utilizes the natural oscillations of atoms or molecules between energy levels for generating a beam of coherent electromagnetic radiation usually in the ultraviolet, visible, or infrared regions of the spectrum; also : the beam of coherent radiation itself How to use laser in a sentence
  • What Is A Laser? | NIST
    A laser is a device in which a collection of atoms or molecules, a semiconductor, or another quantum system, is held between mirrors and energized, or pumped, so that something in the system (the electrons, for example) reach a higher-energy "excited" state \
  • What Are Lasers and How Do They Work? | DOSLASER
    What are lasers? A laser is a device that produces a narrow, intense beam of light at a single wavelength The word laser is an acronym for Light Amplification by Stimulated Emission of Radiation Unlike a flashlight, which spreads light in many directions and colors, a laser sends coherent light along one path, which lets it mark, engrave and cut with precision
  • What Is a Laser? How Lasers Work and the Main Types
    A laser is a beam of light where every wave travels in step, in one direction, at one colour That coherence is what lets it stay tight over distance and concentrate enough energy to cut steel
  • Laser - jupiterscience. com
    A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation The term "laser" is an acronym for Light Amplification by Stimulated Emission of Radiation
  • What Is a Laser? Types, Properties Applications | Opt Lasers
    A laser is a source of electromagnetic radiation that uses optical amplification based on stimulated emission The word LASER comes from Light Amplification by Stimulated Emission of Radiation
  • How does a laser work? - Encyclopedia Britannica
    In a laser, a passing photon with the right energy stimulates an excited atom to emit a photon of the same energy, phase, and direction, creating a coherent light wave
  • LIA - Home | The Laser Institute
    Discover essential tools, publications, and educational materials to support your work in laser technology and safety From safety standards to training tools and industry-focused publications, our resources are designed for safety professionals, researchers, educators, and healthcare professionals





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