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 ]
Headed to a night of lasers and stargazing. Love ya, CSC.
charizardi (Charissa Sedor) Fri, 06 Nov 2009 22:36:02 -0000
Headed to a night of lasers and stargazing. Love ya, CSC.
If you love something, feed it lasers and pizza: Machine Project ... http://bit.ly/3Keo6F
RomanticToyz (RomanticToyz.com) Fri, 06 Nov 2009 22:27:19 -0000
If you love something, feed it lasers and pizza: Machine Project ... http://bit.ly/3Keo6F
Guns don't kill people...lasers do!
rohanedmonson (Rohan Edmonson) Fri, 06 Nov 2009 22:26:43 -0000
Guns don't kill people...lasers do!
@sineadcrilly yea lasers!!! Ooh cmon x factor
Deanfitz (Dean Fitz) Fri, 06 Nov 2009 22:22:23 -0000
@sineadcrilly yea lasers!!! Ooh cmon x factor
If you love something, feed it lasers and pizza: Machine Project ...: If you love something like that, you have.. http://bit.ly/KFo6w
shellygirl6 (Shelly) Fri, 06 Nov 2009 22:21:58 -0000
If you love something, feed it lasers and pizza: Machine Project ...: If you love something like that, you have.. http://bit.ly/KFo6w
If you love something, feed it lasers and pizza: Machine Project ...: If you love something like that, you have.. http://bit.ly/KFo6w
ChristinaGLy (ChristinaGLy) Fri, 06 Nov 2009 22:13:19 -0000
If you love something, feed it lasers and pizza: Machine Project ...: If you love something like that, you have.. http://bit.ly/KFo6w
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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