This is a website, designed for a science project that explains in detail how a basic CD player works and how we can then hear the sound.
A compact disc is a thin, circular disc of metal and plastic about 12cm (just over 4½ inches) in diameter. It's actually made of three layers. Most of a CD is made from a tough, brittle plastic called polycarbonate. Sandwiched in the middle there is a thin layer of aluminium . Finally, on top of the aluminum, is a protective layer of lacquer. The first thing you notice about a CD is that it is shiny on one side and dull on the other. The dull side usually has a label on it telling you what's on the CD; the shiny side is the important part. It's shiny so that a laser beam can bounce off the disc and read the information stored on it
A compact disc is a thin, circular disc of metal and plastic about 12cm (just over 4½ inches) in diameter. It's actually made of three layers. Most of a CD is made from a tough, brittle plastic called polycarbonate. Sandwiched in the middle there is a thin layer of aluminium . Finally, on top of the aluminum, is a protective layer of lacquer. The first thing you notice about a CD is that it is shiny on one side and dull on the other. The dull side usually has a label on it telling you what's on the CD; the shiny side is the important part. It's shiny so that a laser beam can bounce off the disc and read the information stored on it