Wolfram Demonstrations Project

A laser reads information from a compact disc at a constant linear speed of 1.2 m/s from

cm in a spiral to the edge of the disc at

cm. The angular speed decreases with increasing

as shown at the top of the figure.

For more specifications, see the Wikipedia entry for Compact Disc.

Contributed by: Enrique Zeleny

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Angular Velocity of a Compact Disc