Compact disc with light interference patterns
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Compact disc with light interference patterns
Compact disc. Photograph of an audio compact disc. 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
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6441117
© DAMIEN LOVEGROVE/SCIENCE PHOTO LIBRARY
Audio Audio Sound Communication Communications Compact Disc Data Storage Disc
EDITORS COMMENTS
This print showcases the intricate beauty of a compact disc, revealing its hidden secrets. The image captures the mesmerizing light interference patterns that dance across the surface of this technological marvel. The compact disc, or CD, is not just an ordinary music storage device; it is a masterpiece of engineering and innovation. Within its sleek design lies a digitized musical signal represented by fine depressions meticulously etched onto its surface. These depressions are precisely followed by a thin film of reflective metal, usually aluminum, which allows laser light to bounce off and be read. To ensure pristine sound quality for years to come, the reflective layer is shielded by a thick layer of transparent plastic that acts as armor against dust and scratches. This protective coating ensures that every note played remains crystal clear. With an impressive capacity to store approximately 80 minutes worth of music, the CD revolutionized audio technology when it was introduced. Its ability to communicate vast amounts of data in such a small package made it an essential tool for musicians and listeners alike. Through this remarkable photograph from Science Photo Library, we gain insight into the inner workings and artistry behind our beloved CDs – objects that have shaped our communication and audio experiences over decades past.
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