英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

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]

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Laser - Wikipedia
    A laser differs from other sources of light in that it emits light that is coherent Spatial coherence allows a laser to be focused to a tight spot, enabling uses such as optical communication, [6] laser cutting, and lithography
  • 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 Airlines - La vida es un buen viaje
    Reserva tus vuelos con LASER Airlines Líder en puntualidad y servicio en Venezuela Conecta con los mejores destinos nacionales e internacionales con total confianza
  • What Are Lasers And How Do They Actually Work? - ScienceAlert
    The most powerful laser designed to date can be found at the European Extreme Light Infrastructure facility in Romania Its lasers are some of the most intense in the world, generating insanely brief pulses of photons, protons, neutrons, and neutrinos with incredible energy
  • Amazon. com: Laser
    Discover a wide range of laser products on Amazon Browse pointers, levels, engravers, hair removal devices, and more for every need
  • How Do Lasers Work? The Physics Behind the Beam
    At its core, a laser is not just a beam of light—it’s a symphony of photons playing in perfect harmony It’s a manifestation of quantum physics working with precision and purpose
  • How do lasers work? | Who invented the laser? - Explain that Stuff
    An easy-to-understand explanation of how lasers work, with a simple diagram showing what's inside a laser
  • What is a Laser? The Light That Changed Science, Technology, and . . .
    A laser is not just light; it is light disciplined, sharpened, and focused into a beam so pure and precise that it can travel across the Moon, cut through steel, perform delicate eye surgery, or carry billions of internet messages in a single second
  • 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
  • Lasers: Understanding the Basics - Photonics
    All light sources convert input energy into light In the case of the laser, the input, or pump, energy can take many forms, the two most common being optical and electrical For optical pumping, the energy source may be a lamp or, more commonly, another laser





中文字典-英文字典  2005-2009