The Information on a Compact Disk Is Scanned by a Laser

question 10

Multiple Choice

The information on a compact disk is scanned by a laser initially at a radius of 2.4 cm and then out to a maximum of 6.0 cm. Because the dimensions of the pit information remain constant with radius, the disk motor adjusts so that the tangential velocity remains constant. What is the ratio of the inner to outer rotational frequencies?

• A) 0.16
• B) 6.3
• C) 1.0
• D) 2.5
• E) 0.40

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Definitions:

Referential

Pertaining to the use of language to refer to objects and ideas, or relating to the ability of something to act as a symbol or stand for something else.

Expressive Style

A communication approach where individuals are more likely to express their thoughts, feelings, and ideas openly and articulately.

Referential Style

A language learning style where children tend to use vocabulary to refer to people, objects, and events, exemplifying an analytical orientation toward speech.

United States

A country located in North America, consisting of 50 states, a federal district, five major self-governing territories, and various possessions.