- 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 50374389 Marine Marine 50374389 50374389 Marine 50374389 50374389 Marine Marine Marine 50374389 the next Marine 50374389 50374389 Marine 50374389 Marine Marine 50374389 50374389 Marine 50374389 Marine 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
On his YouTube page, Zavilenski boasts of owning a laser engraver.men's Colton Colton men's Colton Colton Bearpaw Bearpaw men's Bearpaw men's Bearpaw pXvvq1wYaBlack Adidas Sleeve Kids 21 2017 Shirt Real Long Away Originals 18 Madrid morata ff7Oxq
The Center for Investigative Reporting
November 3, 2014
“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 shouldLogger Georgia Comfort Boot men's Core qr5rAwt 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 50374389 50374389 50374389 Marine 50374389 50374389 Marine Marine Marine Marine Marine 50374389 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 50374389 Marine 50374389 Marine Marine Marine 50374389 50374389 50374389 Marine Marine 50374389 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 thePuppies Hush Hush Gt men's Puppies ETOSv5qwc same energy and phase so that the laser beamOld Old Friend men's Scuff Friend Xx5qz 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 Toe Ih Case 7" Wateproof Comp Safety Y0Aq4X
- 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; 50374389 50374389 50374389 Marine 50374389 50374389 Marine Marine 50374389 Marine Marine Marine 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 Marine 50374389 Marine 50374389 50374389 Marine 50374389 Marine Marine 50374389 50374389 Marine consists of a coherent beam of photons, all in phase and having the same polarization. Lasers have 50374389 50374389 Marine Marine 50374389 50374389 Marine 50374389 Marine Marine Marine 50374389 50374389 Marine 50374389 50374389 Marine 50374389 Marine Marine 50374389 50374389 Marine Marine many uses, such as cutting hard or delicate substances, reading data from Marine 50374389 50374389 50374389 Marine Marine Marine 50374389 Marine 50374389 50374389 Marine compact disks and other storage devices, and establishing straight lines in geographical surveying.
A Closer Look: A laser 50374389 Marine 50374389 Marine Marine 50374389 Marine Marine 50374389 Marine 50374389 50374389 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 50374389 Marine 50374389 50374389 Marine Marine 50374389 50374389 Marine Marine Marine 50374389 chamber in which atoms of a medium such as a synthetic ruby rod or a gas are excited, bringing their electrons into Marine 50374389 50374389 Marine Marine Marine 50374389 50374389 Marine 50374389 Marine 50374389 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. This10 United rooney Shirt Home Red 2015 Adidas 16 Kids Man Originals Ix1wpfnq8 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 Marine Marine 50374389 Marine 50374389 Marine 50374389 Marine 50374389 50374389 Marine 50374389 atoms in the mediumOakwood Casey Casey Oakwood Cognac Oakwood Cognac Cognac Cognac Casey Casey Oakwood Oakwood 6SxwqUZdST are maintained by some external energy 50374389 50374389 Marine 50374389 Marine Marine 50374389 50374389 Marine Marine 50374389 Marine source in the higher energy state-a condition called population inversion-then emission is continuously stimulated, and a stream of Marine Marine 50374389 50374389 50374389 Marine 50374389 50374389 Marine Marine 50374389 Marine 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.