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A laser (from the acronym Light Amplification by Stimulated Emission of Radiation) is an optical source that emits photons in a coherent beam. The back-formed verb to lase means "to produce laser light" or possibly "to apply laser light to".
Laser light is typically near-monochromatic, i.e. consisting of a single wavelength or color, and emitted in a narrow beam. This is in contrast to common light sources, such as the incandescent light bulb, which emit incoherent photons in almost all directions, usually over a wide spectrum of wavelengths.
Laser action is explained by the theories of quantum mechanics and thermodynamics. Many materials have been found to have the required characteristics to form the laser gain medium needed to power a laser, and these have led to the invention of many types of lasers with different characteristics suitable for different applications.
More on [ Laser ]
Flashlights :: Accessories
Lighting :: Emergency Supplies
Lighting :: Outdoors
@wondroushippo I've bought flashlights and lasers from DealExtreme in the past. Most of them still work but YMMV.
vicdeleon (vic deleon) Sat, 12 Dec 2009 10:39:04 -0000
@wondroushippo I've bought flashlights and lasers from DealExtreme in the past. Most of them still work but YMMV.
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Walker Lights - Offers Pelican and Lectro Science (LSI) high-powered flashlights and hand-held spotlights.
