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. The first laser was built in 1960 by … Skatīt vairāk Lasers are distinguished from other light sources by their coherence. Spatial (or transverse) coherence is typically expressed through the output being a narrow beam, which is diffraction-limited. Laser beams … Skatīt vairāk Electrons and how they interact with electromagnetic fields are important in our understanding of chemistry and physics. Stimulated emission In the Skatīt vairāk Foundations In 1917, Albert Einstein established the theoretical foundations for the laser and the maser in the paper "Zur Quantentheorie der Strahlung" ("On the Quantum Theory of Radiation") via a re-derivation of Max Planck's … Skatīt vairāk When lasers were invented in 1960, they were called "a solution looking for a problem". Since then, they have become ubiquitous, … Skatīt vairāk A laser consists of a gain medium, a mechanism to energize it, and something to provide optical feedback. The gain medium is a material with properties that allow it to amplify light by way of stimulated emission. Light of a specific wavelength that passes … Skatīt vairāk A laser can be classified as operating in either continuous or pulsed mode, depending on whether the power output is essentially continuous over time or whether its … Skatīt vairāk Gas lasers Following the invention of the HeNe gas laser, many other gas discharges have been found to … Skatīt vairāk TīmeklisLáser. Para otros usos de este término, véase Láser (desambiguación). Láseres de estado sólido emitiendo a (de arriba abajo) 405 nm, 445 nm, 520 nm, 532 nm, 635 …
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TīmeklisDidemnum lacertosum [1] är en sjöpungsart som beskrevs av Monniot 1995. Didemnum lacertosum ingår i släktet Didemnum och familjen Didemnidae. [1] [2] Inga underarter finns listade i Catalogue of Life.[1]Källor TīmeklisLaser – urządzenie emitujące promieniowanie elektromagnetyczne z zakresu światła widzialnego, ultrafioletu lub podczerwieni, wykorzystujące zjawisko emisji … land acknowledgement for kitchener waterloo
Laser – Wikipédia, a enciclopédia livre
TīmeklisLaser al crisoberillo drogato al cromo ( alessandrite ) Generalmente sintonizzato nella gamma da 700 a 820 nm. Lampada stroboscopica, diodo laser, arco al mercurio (per … http://wiki.manizales.unal.edu.co/index.php/Treatment-of-Refractory-Melasma-throughout-The-natives-Using-the-Picosecond-Alexandrite-Lazer-b TīmeklisLaser (singkatan dari bahasa Inggris: Light Amplification by Stimulated Emission of Radiation) merupakan mekanisme suatu alat yang memancarkan radiasi … land acknowledgement city of calgary