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Laser light can travel a large distance in outer space with little reduction in signal strength(3). Because of the high frequency lasers have, lasers are ideal for space communications(1). Low-loss optical fibers have been developed to transmit laser light for earthbound communication in telephone and computer(2). Laser techniques have also been used for high density information recording(2). For instance, laser light simplifies the recording of a hologram, from which a three-dimensional image can be reconstructed with a laser beam(2). Lasers are also used to play your CDs and videos.
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