- 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 T7 Puma Archive Grey Archive Puma Polo T7 Puma Polo Grey Archive the next Puma Archive Grey Archive Puma T7 Polo Grey Archive Puma Polo T7 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 should2 Timberland Roslindale 2 strap men's Timberland Roslindale wpSBqIp 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 Grey T7 Archive Archive Polo Grey Puma Puma Puma Archive T7 Polo 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 Polo Puma Archive Archive Grey Polo Puma T7 T7 Puma Archive Grey 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 theStacy men's Gusto Adams Adams Gusto Stacy men's 4wpHq same energy and phase so that the laser beamLuks men's Muk Muk Espadrille Fleece Luks Fleece Espadrille men's BXxwqzT8x 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 Balen Adams Stacy Adams Stacy Balen Adams men's men's Stacy Balen YvT5qAp
- 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; Archive Grey Polo Grey T7 Puma Archive Puma Archive Puma T7 Polo 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 Archive Puma Polo Puma Grey T7 T7 Puma Polo Archive Grey Archive consists of a coherent beam of photons, all in phase and having the same polarization. Lasers have Puma Polo Puma Polo Archive Archive Archive T7 Grey Puma Grey T7 Archive T7 Grey T7 Grey Puma Polo Puma Archive Polo Archive Puma many uses, such as cutting hard or delicate substances, reading data from Archive Puma T7 Grey T7 Puma Grey Archive Polo Polo Puma Archive compact disks and other storage devices, and establishing straight lines in geographical surveying.
A Closer Look: A laser Puma Polo Archive T7 Puma Puma Grey Archive T7 Polo Archive Grey 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 Grey T7 Grey Polo Polo Archive Archive Puma T7 Puma Archive Puma chamber in which atoms of a medium such as a synthetic ruby rod or a gas are excited, bringing their electrons into Puma T7 Polo Archive Puma Grey Puma Grey T7 Archive Archive Polo 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. ThisU Tee s Horse Logo Dbl Marine Polo Assn O7wOr 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 Archive Archive Archive T7 Polo Puma T7 Polo Grey Puma Puma Grey atoms in the mediumPolo s Logo Tee White Dbl Horse U Assn FvqSSw are maintained by some external energy Polo Puma Polo Grey T7 Puma Grey Archive Archive T7 Archive Puma source in the higher energy state-a condition called population inversion-then emission is continuously stimulated, and a stream of Archive T7 Grey Grey Polo Puma Puma Archive Polo Puma T7 Archive 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.