Compact disc surface, light micrograph

Compact disc surface, light micrograph

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Caption: Compact disc surface. Light micrograph of the surface of a compact disc (CD). The plastic disc is pressed with a series of fine depressions (dots) representing a digitised musical signal capable of being read by a laser. Each depression is either long or short, and represents a bit. Eight bits form a byte. CDs can hold millions of bytes of data. Magnification: x1000 when printed 10 centimetres wide.

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Keywords: audio, audio sound, bit, bits, cd, close-up, communication, communications, compact disc, data, depressions, detail, digital, digitised, disk, high-tech, light micrograph, lm, music, pattern, pit, pits, pitted, repeated, sound, storage, surface, technological, technology

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