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Compact discs

Compact discs

T515/0199

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Credit

ALAN L. DETRICK / SCIENCE PHOTO LIBRARY ALAN L. DETRICK / SCIENCE PHOTO LIBRARY

Caption

Compact discs. Assortment of compact discs (CD's). Each disc stores audio data such as 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 and scratches from affecting the sound quality.

Release details

Model release not required. Property release not required.

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