A powerful beam of light that can produce intense heat when focused
at close range. Lasers are used in medicine in microsurgery, cauterization, for
diagnostic purposes, etc. For example, lasers are employed in microsurgery to cut
tissue and remove tissue.
T echnical Note: A laser concentrates high energies into an intense narrow beam
of nondivergent monochromatic electromagnetic radiation; Lasers using various substances
(ruby, argon, krypton, neodymium, helium-neon, carbon dioxide) are available.
Laser is an acronym coined in 1960 from a forgettable term: Light Amplification
by Stimulated Emission of Radiation.
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