Science Entry
DVDs

In science class we are studying many things, also electronics. We studied computers and all the things related to them. We also studies DVDs... Everyone uses DVDs but not many people know what they actually are and how they work.
DVD stands for Digital Versatile Disc. It can be used to store data such as movies.
But how do DVDs actually work? In DVDs data is stored in small indentations and flats backed up by a reflective material.
When you insert a DVD in a DVD player, a mechanism inside the DVD player spins the disc and another one guides a laser beam that shines on the indentations and flats. The light patters are then “reflected” and read by an optical device that coverts the patters in tiny pieces of data which are called “bits”. These “bits” are then transformed in bytes that can represent data such videos, sounds etc.