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Chirag Gohel: August 2011
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Tuesday, August 16, 2011. A Compact Disc (CD) is an optical disc used to store digital data. CD-ROMs and CD-Rs remain widely used technologies in the computer industry.CD-ROM drives employ a near-infrared 780 nm laser diode. The laser beam is directed onto the disc via an opto-electronic tracking module, which then detects whether the beam has been reflected or scattered. What makes a CD? A CD is made up of a polycarbonate plastic known as Polymethyle Meta acrylic. 8226; Track pitch: 1.6 µm. CDs are susc...