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Audio compact disc

Audio compact disc

T515/0160

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Credit

ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY

Caption

Photograph of an audio compact disc (CD), showing the multicoloured interference pattern produced by reflecting a laser beam off of the CD's surface. The CD stores music as a series of fine depressions, representing a digitised musical signal capable of being read by a laser. To reflect the laser light, the music layer is coated with a fine film of metal which follows the depressions exactly. This layer is covered by another layer of transparent plastic which prevents dust & scratches from affecting the sound quality.

Release details

Model release not required. Property release not required.

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