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The word laser stands for Light Amplification by the Stimulation Emission of Radiation,abercrombie. In 1916,longchamp pas cher, Albert Einstein developed the theory of Stimulated Emission. Simply put, it is a process where a photon is emitted from an atom and crashed into other atoms, causing them to also emit photons. In a vacuum chamber,sac longchamp pas cher, more and more photons bounce around,longchamp moins cher,abercrombie outlet 12926
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The 60s heralded new breakthroughs in laser technology. Theodore Maiman built the first working optical light laser in 1960. It used a solid state laser that incorporated a synthetic ruby,converse all star. The first semiconductor laser was developed in 1962,converse pas cher.
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Helium-neon lasers
Helium-neon lasers are the cheapest visible light lasers. In 1974, they were used as bar code scanners, first in grocery stores and now in many large retail stores. The laser is scanned across a bar code and tells the cash register’s computer the price of the item. It can also provide information on sale discounts,converse discount, stock numbers and inventory.
Lasers are used by surveyors and machinists to measure distance and align parts,converse pas cher all star. They are used to measure the speed of light in a laboratory, distances on a street or movement along an earthquake fault,converse pas cher.
Argon lasers
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Argon lasers make holograms, and are used in spectrochemistry, optical image processing, semiconductor processing and laser light shows,converse pas cher.
Solid state lasers
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Scientists use solid state lasers to detect the slightest movements in matter. Law enforcement has long used laser technology for gauging the speed of cars. The military is using solid state lasers in rangefinders, laser guided bombs and satellite communications systems,longchamp pas cher.
The largest lasers in the world are solid state lasers,abercrombie outlet. Many of the laser projectors for light shows and for other laser displays use solid state rather than argon or krypton gas lasers.
Semiconductor lasers
Semiconductors are used to produce lasers with invisible light,sac longchamp. The first successful consumer product to include a laser, the laserdisc player, was introduced in 1978,converse all star. In 1983,converse enfant, the compact disc player was introduced,sac longchamp. Currently, lasers are also used in DVD players, cellular phones,longchamp pas cher neuf, laser printers and wireless Internet transmission,prix converse.