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laser, light amplification by stimulated emission of radiation

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laser, light amplification by stimulated emission of radiation (in French laser) technical light source with special properties of the emitted rays: 1. monochromatic (extremely narrow-band wavelength range, to be limited exactly to 0.1 nanometers), 2. coherent (predictable route and interference properties through high constancy of the wavelength, important for example in distance measuring, holography); 3. parallel (ideal bundling capacity for high energy densities); thus numerous possible applications, including printing forme illustration, laser printing (photoconductive drum), marking plastic packages.