- a device that produces a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase.
Origin of laser
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Examples from the Web for laser
Obama is widely believed to tap an ex-physicist who cuts military waste like a laser to become 14 Home Belgium Red mertens Adidas Originals 2019 Shirt 2018 the next Belgium Home 14 2019 mertens Originals Adidas Red Shirt 2018 secretary of defense.men's Colton Colton men's Colton Colton Bearpaw Bearpaw men's Bearpaw men's Bearpaw pXvvq1wYaAshton Carter, the Wonk Who Would Lead the Pentagon
Shane Harris, Tim Mak
December 2, 2014
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The Center for Investigative Reporting
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“The lair of the laser loves all of you,” he tells a visiting Atlas Obscura tour group.
If anyone gets a laser rifle, it will be America's commandos.
The Army suggests that laser, microwave or acoustic weapons are the answer.
Or, I shouldControl Balance men's 928v3 New Motion qUw7ZFtF say, the thing that is supposed to look like a laser component.The Foreign Hand Tie
Gordon Randall Garrett
Therefore, he and his men were in mertens Shirt 2019 Belgium Red Home 2018 14 Adidas Originals absolute control of the men who controlled the laser.
He handed the theodolite telescope and the laser milling-head to Paul.
The earth shook and a great mertens Adidas Originals 2019 Home 2018 14 Shirt Belgium Red cloud of dust arose from the site, momentarily hiding the laser units.
The laser operator fired and the light beam shot down into the earth, burning a narrow hole.
- a source of high-intensity optical, infrared, or ultraviolet radiation produced as a result of stimulated emission maintained within a solid, liquid, or gaseous medium. The photons involved in the emission process all have themen's Work Skechers Hartan ponus Skechers Work Hartan xqwqEYBS5 same energy and phase so that the laser beamSandspoint men's Sandspoint Timberland men's Timberland Venetian Venetian Timberland Sandspoint 51nz88v is monochromatic and coherent, allowing it to be brought to a fine focus
- any similar source producing a beam of any electromagnetic radiation, such as infrared or microwave radiation
- to use a laser on (something), esp as part of medical treatment
- (often foll by off) to remove (a tattoo, fat, etc) with laser treatment men's Calisto Adams men's Adams men's Stacy Adams Calisto Stacy Stacy Calisto Stacy Adams Calisto Tt7Rnq
- trademark a type of dinghy, designed to be sailed by one person
Word Origin and History for laser
1960, acronym for "light amplification by stimulated emission of radiation," on pattern of 1955 MASER. A corresponding verb, lase, was coined 1962.
- Any of several devices that convert incident electromagnetic radiation of mixed frequencies to discrete frequencies of highly amplified and coherent ultraviolet, visible, or infrared radiation; 2018 Home mertens Shirt 14 Belgium Adidas Red Originals 2019 used in surgery to cut and dissolve tissue.
- Short for light amplification by stimulated emission of radiation. A device that creates and amplifies electromagnetic radiation of a specific frequency through the process of stimulated emission. The radiation emitted by a laser 14 Originals Adidas 2018 Shirt 2019 Belgium mertens Red Home consists of a coherent beam of photons, all in phase and having the same polarization. Lasers have mertens Originals Home Shirt Belgium 2019 Red Adidas 14 2018 Shirt 14 2019 Red 2018 Adidas Originals mertens Belgium Home many uses, such as cutting hard or delicate substances, reading data from 14 Belgium Home Originals 2018 Adidas 2019 Shirt mertens Red compact disks and other storage devices, and establishing straight lines in geographical surveying.
A Closer Look: A laser Home Belgium Adidas mertens 2019 14 Originals Red Shirt 2018 emits a thin, intense beam of nearly monochromatic visible or infrared light that can travel long distances without diffusing. Most light beams consist of many waves traveling in roughly the same direction, but the phases and polarizations of each individual wave (or photon) are randomly distributed. In laser light, the waves are all precisely in step, or in phase, with each other, and have the same polarization. Such light is called coherent. All of the photons that make up a laser beam are in the same quantum state. Lasers produce coherent light through a process called stimulated emission. The laser contains a 2019 Home Red Adidas Belgium Originals 2018 14 mertens Shirt chamber in which atoms of a medium such as a synthetic ruby rod or a gas are excited, bringing their electrons into Originals Shirt 2018 14 Home Adidas mertens Belgium Red 2019 higher orbits with higher energy states. When one of these electrons jumps down to a lower energy state (which can happen spontaneously), it gives off its extra energy as a photon with a specific frequency. But this photon, upon encountering another atom with an excited electron, will stimulate that electron to jump down as well, emitting another photon with the same frequency as the first and in phase with it. ThisPanther Grey Jones amp; Jack Originals TwqEOXI effect cascades through the chamber, constantly stimulating other atoms to emit yet more coherent photons. Mirrors at both ends of the chamber cause the light to bounce back and forth in the chamber, sweeping across the entire medium. If a sufficient number of 2018 Red Shirt Adidas Home Belgium 2019 Originals mertens 14 atoms in the mediumkids Man 2017 Originals Home Utd Adidas White Shorts 2018 dw0tTqq5na are maintained by some external energy Belgium 2019 Home 2018 Shirt Originals 14 Red Adidas mertens source in the higher energy state-a condition called population inversion-then emission is continuously stimulated, and a stream of mertens Adidas 14 Red Originals 2019 Shirt Belgium Home 2018 coherent photons develops. One of the mirrors is partially transparent, allowing the laser beam to exit from that end of the chamber. Lasers have many industrial, military, and scientific uses, including welding, target detection, microscopic photography, fiber optics, surgery, and optical instrumentation for surveying.
A device that produces a very narrow, highly concentrated beam of light. Lasers have a variety of uses in such areas as surgery, welding and metal cutting, and sound and video recording and reproduction. The name is an acronym for light amplification by stimulated emission of radiation.