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Laser - Wikipedia Laser A telescope in the Very Large Telescope system producing four orange laser guide stars A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation
激光（受激辐射光放大）_百度百科 激光是20世纪以来继核能、电脑、半导体之后，人类的又一重大发明，被称为“最快的刀”、“最准的尺”、“最亮的光”。英文名Light Amplification by Stimulated Emission of Radiation，意思是“通过受激辐射光扩大”。激光的英文全名已经完全表达了制造激光的主要过程。激光的原理早在 1916年已被著名物理
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
What Is a Laser? | NASA Space Place – NASA Science for Kids What Is a Laser? The Short Answer: A laser produces a very narrow beam of light that is useful in many technologies and instruments The letters in the word laser stand for L ight A mplification by S timulated E mission of R adiation The letters in the word laser stand for L ight A mplification by S timulated E mission of R adiation
Laser - Introduction - What is a Laser? Laser emits light through a process called stimulated emission of radiation which amplifies or increases the intensity of light Some lasers generate visible light but others generate ultraviolet or infrared rays which are invisible In general, when electron jumps from a higher energy level to a lower energy level, it emits light or photon
What is a laser? | Laser Applications | Spectral School What is a Laser? A laser is an intense light source that is coherent, directional, and monochromatic This means that the phases of the light waves are aligned, the waves travel in a single direction, and they emit a narrow range of wavelengths 1 This is different to other light sources, such as lamps or light-emitting diodes (LEDs), which are typically less intense, non-coherent (phases of
What Are Lasers And How Do They Actually Work? - ScienceAlert How do lasers do laser stuff? The beating heart of lasers are materials that give parts of the electromagnetic spectrum a boost of energy as they pass through This boost is referred to as ' gain ', and can effectively amplify the light's power Behind this amplification is a process called stimulated emission
What Is a Laser? How Does It Work? - Optics Mag A laser diode or an injection laser is a semiconductor device that emits coherent light During operation, the device is pumped with electrical current or light from another laser
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 \