Optical disc surface, SEM

Numéro d’image : 12528411
Optical disc surface, SEM
Optical disc surface. Differential interference contrast (DIC) light micrograph of the surface of an optical disc. Compact discs (CDs) and digital versatile discs (DVDs) are examples of optical discs. An optical disc digitally stores data, such as music and films, as tiny depressions (gold) in a plastic disc (black). Each depression is either long or short, each representing a bit. Eight bits form a byte. CDs can hold millions of bytes of data. DVDs can hold billions of bytes of data. The data track is about 0.5 micrometres wide, and is several kilometres long. The information is read by a laser light that reflects from a metal layer, allowing the original data to be reconstructed. Magnification: x416 when printed 10cm wide.
Licence : Droits gérés
Crédit: Science Photo Library / EYE OF SCIENCE
Taille de l’image : 3070 px × 2055 px
Model Release : Non requis
Property Release : Non requis
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  • All moral rights asserted. Recolouring or alteration of the image is prohibited without permission.

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