✳flâneur — a map of the web's best reading

Laser - Wikipedia

en.wikipedia.org · 16,787 words · saved by 1 readers

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word laser is an anacronym that originated as an acronym for light amplification by stimulated emission of radiation.[1][2] The first laser was built in 1960 by Theodore Maiman at Hughes Research Laboratories, based on theoretical work by Charles H. Townes and Arthur Leonard Schawlow.[3] A laser differs from other sources of light in that it emits light that is coherent. Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography. It also allows a laser beam to stay narrow over great distances (collimation), a feature used in applications such as laser pointers and lidar (light detection and ranging). Lasers can also have high temporal coherence, which permits them to emit light with a very narrow frequency spectrum. Alternatively, temporal coherence can be used to produce ultra

Laser - Wikipedia Jump to content From Wikipedia, the free encyclopedia Device that emits light via optical amplification For other uses, see Laser (disambiguation) . "Laser beam" redirects here; not to be confused with LazarBeam or Lazer Beam . A researcher working on an optical system A telescope in the Very Large Telescope system producing four orange laser guide stars A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation . The word laser originated as an acronym for light amplification by stimulated emi

Explore this link on the map →

related reading