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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 ]
i had a good time at flat top grill last night... on my way to work now... later hopefully some laser tag :-)
qtchocolategirl (Tracy Booker) Sun, 03 Jan 2010 17:07:45 -0000
i had a good time at flat top grill last night... on my way to work now... later hopefully some laser tag :-)
SAMSUNG CLP-315/XAA Personal Up to 17 ppm Laser Printer for $99.99 at http://bit.ly/4vAbpt Please RETWEET this Message
99HotDeals (Thanksgiving Deals) Sun, 03 Jan 2010 17:06:20 -0000
SAMSUNG CLP-315/XAA Personal Up to 17 ppm Laser Printer for $99.99 at http://bit.ly/4vAbpt Please RETWEET this Message
Laser therapy may be better than drugs or other approaches for treating acute or chronic neck pain. See details: http://bit.ly/8UwqCV
PainTopics_org (PainTreatment Topics) Sun, 03 Jan 2010 17:05:16 -0000
Laser therapy may be better than drugs or other approaches for treating acute or chronic neck pain. See details: http://bit.ly/8UwqCV
@snostjarna hallå! såg precis ditt meddelande till @pillan76 . Jag är här och läser en del, men skriver inte så ofta.
katrin_l (Katrin Lindberg) Sun, 03 Jan 2010 17:04:35 -0000
@snostjarna hallå! såg precis ditt meddelande till @pillan76 . Jag är här och läser en del, men skriver inte så ofta.
br tau klo matanya superman bisa buat nge rebuild sesuatu yg ud ancur, gw kira cm bisa keluar sinar laser...
safetyhelmets (Ferry Novrianto) Sun, 03 Jan 2010 17:04:04 -0000
br tau klo matanya superman bisa buat nge rebuild sesuatu yg ud ancur, gw kira cm bisa keluar sinar laser...
What's cooler than cats with laser beam eyes? Owls in your phone. #HootSuiteiPhone http://hootsuite.com/iphone
iCoNiC500 (Gerald Allen-Burrell) Sun, 03 Jan 2010 17:01:26 -0000
What's cooler than cats with laser beam eyes? Owls in your phone. #HootSuiteiPhone http://hootsuite.com/iphone
Excel Technology, Inc. - Designs, develops, manufactures and markets tunable solid state and multi-wavelength laser products for dental, medical and industrial markets. (Nasdaq: XLTC).
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