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Laser (Light Amplification By Stimulated Emission of Radiation) - Definition

Laser is an abbreviation for Light Amplification by Stimulated Emission of Radiation. It is an intense, usually focused, beam of light. Lasers are commonly used in data storage and retrieval in computers, such as CD and DVD players. Bar code readers in stores use lasers. Doctors use lasers to do delicate surgery, such as eye surgery. Lasers carry TV and telephone signals over special cables. Metal workers use lasers to cut and weld metal into everything from street light poles to cars.

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