Block, SkipCaptcha, Upload, Automoderated users, Check users, delete, edit, Moderators, move, oversight, protect, rollback
19,323
edits
Changes
Jump to navigation
Jump to search
Line 3:
Line 3: − + − [http://lisa.jpl.nasa.gov/] They're also used in bar code scanners.+ + + +
also becoming a weapon
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.
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. <ref>http://lisa.jpl.nasa.gov</ref> They're also used in bar code scanners.
In recent years, lasers have even become a seemingly effective weapon for certain militaries. They seem effective against a variety of targets, including planes, missiles, and ground vehicles.<ref>http://edition.cnn.com/videos/us/2015/03/05/orig-lockheed-martin-laser-blasts-truck.cnn</ref><ref>http://edition.cnn.com/2014/12/11/tech/innovation/navy-laser-weapon/index.html</ref><ref>http://www.popsci.com/tags/laser-weapons</ref>
==References==
<references/>
<references/>
[[Category:Technology]]
[[Category:Technology]]