Representing Audio Information

A compact disk (CD) stores audio information digitally. On the surface of the CD are microscopic pits that represent binary digits. A low intensity laser is pointed as the disc. The laser light reflects strongly if the surface is smooth and reflects poorly if the surface is pitted.

A compact disk (CD) stores audio information digitally. On the surface of the CD are microscopic pits that represent binary digits. A low intensity laser is pointed as the disc. The laser light reflects strongly if the surface is smooth and reflects poorly if the surface is pitted.