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Optical Disk ○꠹｜Definition｜1st｜20251119205401-00-⌔
Optical disc
An optical disc is a flat, usually1 disc-shaped object that stores information in the form of physical variations on its surface that can be read with a beam of light. Optical discs can be reflective, where the light source and detector are on the same side of the disc, or transmissive, where light shines through the disc to be detected on the other side. They may contain analog or digital information, or a mixture of the two. Their main uses are the distribution of electronic media and data, and archival storage.
Printed 2026-06-28.
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Link to original Footnotes
See shaped compact disc and bootable business card for instance, for exceptions. ↩
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