Gourt > Science > Physics > Education > Light and Optics > Lasers
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 ]
@jrishel Like those lasers that go "Pugh, Pugh, Pugh!"
Hum4n (Hum4n) Thu, 17 Dec 2009 20:48:48 -0000
@jrishel Like those lasers that go "Pugh, Pugh, Pugh!"
Physics of Modern Comm Hi-Fi Sound to Lasers #passfail
bensteward (robot) Thu, 17 Dec 2009 20:45:17 -0000
Physics of Modern Comm Hi-Fi Sound to Lasers #passfail
a wrote a new blog post: Construction lasers are valuable tools that save time http://bit.ly/5VpvcK
preampcc (phuket tho15ngsom) Thu, 17 Dec 2009 20:43:01 -0000
a wrote a new blog post: Construction lasers are valuable tools that save time http://bit.ly/5VpvcK
RT @afrofantasy: Uh oh! Found another blog (@EvelynNAlfred 's) to read while grad school recharges it's soul-sucking lasers
EvelynNAlfred (Evelyn N. Alfred) Thu, 17 Dec 2009 20:38:28 -0000
RT @afrofantasy: Uh oh! Found another blog (@EvelynNAlfred 's) to read while grad school recharges it's soul-sucking lasers
Where lasers meet liquidity.. Saunders college vision aka Clark sat in fantastic presentation
neilhair (neilhair) Thu, 17 Dec 2009 20:36:59 -0000
Where lasers meet liquidity.. Saunders college vision aka Clark sat in fantastic presentation
Doors are open folks. 500 people. Looks great. Blisslight lasers are doing an awesome job, as always, uplighting a 16' x 60' wide scrim
LuminaProducer (Lumina AV Sales) Thu, 17 Dec 2009 20:29:21 -0000
Doors are open folks. 500 people. Looks great. Blisslight lasers are doing an awesome job, as always, uplighting a 16' x 60' wide scrim
Argon Gas Laser System - The argon laser was invented in 1964 by William Bridges at Hughes Aircraft and is one of a family of ion lasers that use a noble gas as the active medium. This laser is used in many applications.
Meta Description: [ The Argon laser was invented in 1964 by William Bridges at Hughes Aircraft and is one of a family of Ion lasers that use a noble gas as the active medium. ]
Don K's Laser Page - So you want a working diode laser? Gives information on laser diode pointers.
How a Laser Works - A tutorial from Livermore National Labs.
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Introduction to Lidar - An introduction to atmospheric lidar for high school students. Lidar can be considered like radar but using light instead of radio waves.
Meta Description: [ a introduction to atmospheric lidarfor high school students ]
Laser Tutorial - Basic explanation of the operation of a laser.
Meta Description: [ An illustrated five part tutorial that describes how lasers work. ]
Lasers - FAQ-like text covering the safe operation and creation of homemade lasers.
Schawlow and Townes Invent the Laser - Bell labs tells the history of the invention and evolution of the LASER at Bell Labs: 1958 - 1998.
The Invention of the Laser at Bell Labs, 1958 - 1998 - Laser history, written by the lab where it happened.
The Laser Adventure - [Windows-based computer preferred for best viewing experience.] In English and Hebrew. A course on Lasers and their Applications developed by Rami Arieli for grades 11-12 and college level.
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What You Should Know When Buying a Laser Pointer - Basic types of laser pointers, their operation and safe use.
Meta Description: [ Blue Laser Diode Modules, Retail and Wholesale, 473 nm, 5 - 100 mW ]
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