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 ]
Lasers - Twitter SearchRT @BieberSergeant: When the clock hits 00:00:00, smoke and lasers are everywhere, Love Me is blaring out the speakers, and then you see him. #MyWorldTourMemoryDazzleKidrauhl (justinbieberââ) Wed, 16 May 2012 14:06:36 -0000
RT @BieberSergeant: When the clock hits 00:00:00, smoke and lasers are everywhere, Love Me is blaring out the speakers, and then you see him. #MyWorldTourMemory
Today is a perfect day for #lasersJorge_HD (Jorge H-D) Wed, 16 May 2012 14:06:30 -0000
Today is a perfect day for #lasers
RT @BieberSergeant: When the clock hits 00:00:00, smoke and lasers are everywhere, Love Me is blaring out the speakers, and then you see him. #MyWorldTourMemoryBieberJawline (Etoile.) Wed, 16 May 2012 14:06:19 -0000
RT @BieberSergeant: When the clock hits 00:00:00, smoke and lasers are everywhere, Love Me is blaring out the speakers, and then you see him. #MyWorldTourMemory
RT @BieberSergeant: When the clock hits 00:00:00, smoke and lasers are everywhere, Love Me is blaring out the speakers, and then you see him. #MyWorldTourMemorykayyyroseee (KAYLA ROSE â¥) Wed, 16 May 2012 14:06:16 -0000
RT @BieberSergeant: When the clock hits 00:00:00, smoke and lasers are everywhere, Love Me is blaring out the speakers, and then you see him. #MyWorldTourMemory
RT @BieberSergeant: When the clock hits 00:00:00, smoke and lasers are everywhere, Love Me is blaring out the speakers, and then you see him. #MyWorldTourMemoryDCastronovoMari (26 DAYS â¤) Wed, 16 May 2012 14:06:04 -0000
RT @BieberSergeant: When the clock hits 00:00:00, smoke and lasers are everywhere, Love Me is blaring out the speakers, and then you see him. #MyWorldTourMemory
RT @BieberSergeant: When the clock hits 00:00:00, smoke and lasers are everywhere, Love Me is blaring out the speakers, and then you see him. #MyWorldTourMemoryLegitTXBelieber (Rachrauhl.) Wed, 16 May 2012 14:06:01 -0000
RT @BieberSergeant: When the clock hits 00:00:00, smoke and lasers are everywhere, Love Me is blaring out the speakers, and then you see him. #MyWorldTourMemory
Subscribe to Lasers RSS feed 
IRIDEX Corporation - Produces semiconductor-based laser systems used to treat eye diseases and skin lesions. (Nasdaq: IRIX).
Meta Description: [ At the IRIDEX Corporation, we provide complete high quality medical solutions to our customers. ]
Laser Diagnostic Technologies, Inc. - A manufacturer of diagnostic, laser scanning ophthalmoscopes used for early detection of glaucoma.
Meta Description: [ Welcome to Carl Zeiss Meditec ]
LaserSight Incorporated - Develops, manufactures and markets ophthalmic lasers with galvanometric scanning systems primarily for use in performing photorefractive keratectomy. (Nasdaq: LASE).
Nidek - Offers specialized ophthalmic laser and diagnostic products.
Meta Description: [ NIDEK is a worldwide ophthalmic, optometric and medical equipment company. Refractive Surgery, Ophthalmic Lasers and Equipment, Diagnostic equipment, Optical Laboratory, Dermatology Lasers and Coating. ]