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  • Laser - Wikipedia

    2021-8-29 · 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 acronym for 'light amplification by stimulated emission of radiation'. The first laser was built in 1960 by Theodore H. Maiman at Hughes Research Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard ...

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    2021-8-24 · A light-emitting diode (LED) is a semiconductor light source that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons.The color of the light (corresponding to the energy of the photons) is determined by the energy required for electrons to cross the band gap of the semiconductor.

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    2021-8-26 · Digital Journal is a digital media news network with thousands of Digital Journalists in 200 countries around the world. Join us!

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  • Timeline

    2010-10-11 · The following is a timeline of Fallout events. Events below must be specifically referenced by date in-game and appropriate references added for each. Any referenced dates from non-canon sources are added to the appropriate timeline here. James Ritty invents the cash register.66 July 14: The Legal Tender Act is passed.67 April 6: Lorenzo Cabot's expedition to the Rub' al Khali begins.68 The ...

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    2021-8-23 · ZDNet's technology experts deliver the best tech news and analysis on the latest issues and events in IT for business technology professionals, IT managers and tech-savvy business people.

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