Compact Discs With Light Interference Patterns
by Damien Lovegrove/science Photo Library
Title
Compact Discs With Light Interference Patterns
Artist
Damien Lovegrove/science Photo Library
Medium
Photograph - Photograph
Description
Compact discs. Photograph of several audio compact discs (CD). 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, normally aluminium, which follows the depressions exactly. The reflective surface is covered by a thick layer of transparent plastic which prevents dust scratches from affecting the sound quality. A standard audio CD can store about 80 minutes of music.
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September 24th, 2018
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