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

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

Laser beams are [[phase coherent]] and self-[[parallel]] (they do not spread out), due to the way they are created, although many cheap laser pointers exhibit 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>

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>

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.