Audio | Compact Disc

: A film of acrylic lacquer seals the reflective layer to prevent corrosion and physical damage. How It Works

CD players use a to scan the disc from the center outward along a spiral track. When the laser hits a pit , it scatters the light; when it hits a land , the light is reflected back to a sensor. The sensor translates these light changes into electrical signals (zeros and ones), which are then converted back into high-fidelity audio. The Compact Disc: An Introduction audio compact disc

: A 1.2 mm thick layer of clear polycarbonate plastic . : A film of acrylic lacquer seals the