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Lasers
The laser is a device that a beam of light that is both scientifically
and practically of great use because it is coherent light. The beam is produced
by a process known as stimulated emission, and the word "laser" is an acronym
for the phrase "light amplification by stimulated emission of radiation."
Light is just like radio waves in the way that it can also carry
information. The information is encoded in the beam as variations in the
frequency or shape of the light wave. The good part is that since light waves
have much higher frequencies they can also hold much mo ....
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