CD AND DVD
CD's and DVD's are made up of small little bumps and dips. The optical drive read these dips and bumps using a laser, they make these as numbers (like ones and zeros)which the computer can understand.An optical drive that can work with multiple types of discs will therefore contain multiple lasers.
How a CD ROM Works Animation
An optical drive in a computer system allows you to use CD's, DVDs, and Blu-ray discs to listen to music or watch a movie. Most drives also allow you to write data to a disc, so you can create your own music CDs or create of back-up copy of important data.
Who invented the optical drive
David Paul Gregg invented the first optical drive but he called it the VIDEODISK