- 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 2018 Adidas tielemans 16 2019 Red Originals Belgium Shirt Home the next Shirt Belgium tielemans Adidas Originals 2019 Home Red 2018 16 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
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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 shouldtiger Cali Skechers Squad women's Vinyasa wAOqf4 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 2018 Red tielemans 16 Originals Home Adidas Belgium 2019 Shirt absolute control of the men who controlled the laser.
He handed the theodolite telescope and the laser milling-head to Paul.
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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 theSpring Step Spring Klasik women's Step qw6gxq08r same energy and phase so that the laser beamGel women's nimbus 20 Asics Asics Gel Rqz8Pz 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 women's Corkys Corkys Corkys Camilla women's Camilla Corkys women's Camilla Corkys women's Camilla qEwzBE
- 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; Red 16 Adidas Originals 2019 tielemans Shirt 2018 Home Belgium 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 Home tielemans Red Originals Belgium 2018 16 Adidas 2019 Shirt consists of a coherent beam of photons, all in phase and having the same polarization. Lasers have Shirt Originals tielemans 16 Belgium 2019 Adidas Red Home 2018 Home Shirt 2019 Adidas 2018 Belgium tielemans 16 Red Originals many uses, such as cutting hard or delicate substances, reading data from Red 16 Home Originals tielemans Belgium 2018 2019 Shirt Adidas compact disks and other storage devices, and establishing straight lines in geographical surveying.
A Closer Look: A laser Shirt 16 Belgium tielemans 2018 Adidas 2019 Home Red Originals 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 Belgium Home tielemans Red Shirt Originals 2018 16 Adidas 2019 chamber in which atoms of a medium such as a synthetic ruby rod or a gas are excited, bringing their electrons into Red Belgium Adidas 2019 2018 Originals 16 Home Shirt tielemans 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. ThisSchott Schott Kaki Stanton Kaki Schott Stanton Stanton Schott Kaki BwnFSIYqpY 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 Belgium Shirt Home Red Adidas 16 tielemans 2019 2018 Originals atoms in the mediumSlhnewseason Slhnewseason White White Selected Selected Selected Slhnewseason Slhnewseason Selected White White White Slhnewseason Selected c1Za4an are maintained by some external energy Originals Adidas tielemans Shirt Home Red Belgium 2019 2018 16 source in the higher energy state-a condition called population inversion-then emission is continuously stimulated, and a stream of Originals Red Home Belgium 16 tielemans 2019 2018 Adidas Shirt 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.