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What are the key features of lasers?

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sorry i cant say more. thats the question we were given.

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  1. Laser is a monochromatic and coherent beam of light. An intense beam of laser can cut through metals


  2. The laser tube itself, a light source, an apperture, beam splitter, objective lens, fully and partially reflecting mirrors and a focal plane. Thats the main componants of a pretty basic laser.
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