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How does a laser work?
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Light is normally composed of different wavelengths (colours) mixed at random. A laser produces an intense beam of high-energy light in which all the light is of the same wavelength. The process is started by an electric current or a flash of light from a flash tube, which causes a gas or ruby rod to send out the laser beam.
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Previous:
Back
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Book:
Best Ever Q&A
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Section:
Science & Technology
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Chapter:
Heat & Light
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