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False-colour SEM of the surface of a compact disc.

False-colour SEM of the surface of a compact disc.

T515/0162

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Credit

DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY

Caption

False-colour scanning electron micrograph of the surface of a compact disc cracked to show the musical layer below (red). The disc is made of plastic, which is pressed with a series of fine depressions (yellow dashes) 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 (unseen) which follows the depressions exactly. This layer is covered by another layer of transparent plastic (yellow green). The music is sandwiched between two layers of plastic, which prevents dust & scratches from affecting the sound. Magnification: x800 at 6x4.5cm size.

Release details

Model release not required. Property release not required.

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