Compact disc and laser. A compact disc (CD) being read by a laser. The 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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Camazine, Scott |
Taille de l’image : | 3230 px × 4175 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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