Difference between revisions of "Laser"

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[[Laser]] is the acronym of "Light Amplification by Stimulated Emission of Radiation."
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[[Laser]] is a word formed from the acronym "Light Amplification by Stimulated Emission of Radiation."
  
Light from a laser is both temporally [[coherent]], meaning it is of a single pure color, and spatially coherent, meaning that it can be easily formed into a thin beam or focused to a small spot. The angle at which a laser beam spreads is determined by [[diffraction]]; a wide beam will diverge more slowly than a narrow beam. Many cheap laser pointers exhibit excess beam dissipation due to cheap manufacturing. This is much more of a problem with Indian and Chinese-manufactured components, as American manufacturers are held to higher standards in workmanship and materials. <ref>http://www.thechinaexpat.com/what-everybody-ought-to-know-about-chinese-manufacturing/</ref>
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Light from a laser is both temporally [[coherent]], meaning it is of a single pure color, and spatially coherent, meaning that it can be easily formed into a thin beam or focused to a small spot. The angle at which a laser beam spreads is determined by [[diffraction]]; a wide beam will diverge more slowly than a narrow beam. Many cheap laser pointers exhibit excess beam dissipation due to cheap manufacturing, and shoddy construction.
  
 
The use of lasers is very important in [[science]] and [[medicine]]; they have also become ubiquitous in [[CD-ROM]] and [[DVD]] players and as pointers.
 
The use of lasers is very important in [[science]] and [[medicine]]; they have also become ubiquitous in [[CD-ROM]] and [[DVD]] players and as pointers.
[http://lisa.jpl.nasa.gov/] They're also used in bar code scanners.
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[[http://lisa.jpl.nasa.gov/]] They're also used in bar code scanners.
==References==
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<references/>
 
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[[category:technology]]
 
[[category:technology]]
[[category:acronyms]]
 

Latest revision as of 17:25, 13 February 2013

Laser is a word formed from the acronym "Light Amplification by Stimulated Emission of Radiation."

Light from a laser is both temporally coherent, meaning it is of a single pure color, and spatially coherent, meaning that it can be easily formed into a thin beam or focused to a small spot. The angle at which a laser beam spreads is determined by diffraction; a wide beam will diverge more slowly than a narrow beam. Many cheap laser pointers exhibit excess beam dissipation due to cheap manufacturing, and shoddy construction.

The use of lasers is very important in science and medicine; they have also become ubiquitous in CD-ROM and DVD players and as pointers. [[1]] They're also used in bar code scanners.