Computer grafica che mostra la luce emessa da un laser a diodo essendo focalizzata su un compact disc da una piccola lente. Il disco metallico sottostante viene attaccato da un l

• Collaboratore: Science Photo Library
• ID dell’immagine: 2ACJANX
• Dimensioni dei file: 53,4 MB (2,4 MB Download compresso)
• Liberatorie: Modello - no | Proprietà - no
• Dimensioni: 5332 x 3500 px | 45,1 x 29,6 cm | 17,8 x 11,7 inches | 300dpi
• Data acquisizione: 10 marzo 2011
• Fotografo: DAVID PARKER/SCIENCE PHOTO LIBRARY

Altre informazioni

Computer artwork showing light emitted by a laser diode being focussed onto a compact disc by a small lens. The metal disc underneath is etched by a laser beam to produce the microscopic pits which carry the digital code representing sounds. The code is read by a laser reflecting the pits of the etched surface back through the lens onto a sensor in a CD player which converts the signal back into music. To reflect the laser light, the music layer is coated with a fine film of metal which follows the depressions exactly. 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.

Parole chiave associate all'immagine

• audio
• autofahren
• avvicinamento
• bytes
• cd
• closoup
• compact disc
• digitale
• diode
• dvd
• elettrici
• elettronica
• fisica
• giocatrice
• in metallo
• laser
• lente
• meccanismo
• microscopic
• musica
• ottica
• ottico
• rom
• segnale
• suoni
• technical
• technology