Optical devices use a ____ to scan the surface of a ____ disc made from ____ and plastic. The disc’s surface is divided into ____, with each track containing many flat areas and ____. The flat areas are known as lands and the hollows as ____. When the laser shines on the disc’s surface, lands ____ the light back, whereas pits ____ the laser beam. A ____ looks for the reflected light. Reflected light (lands) represents a binary ____, and no reflection (pits) represents a binary ____.

How do optical discs work?

Leaderboard

Visual style

Options

Switch template

Continue editing: ?