Question

What is DVD drive in computer?

Answer 1

DVD : It is an optical disc storage media format that can be used for data storage, including movies with high quality video and sound. DVDs resemble compact discs; their physical dimensions are the same 12cm or the mini 8cm but they are encoded in a different format and at a much higher density.

DVDs are made from a 0.6mm thick disc of polycarbonate plastic coated with a much thinner (reflective) aluminium layer. Two such discs are glued together to form a 1.2mm double-sided disc.

The basic DVD disc is thinner than a CD to make it possible to use lens with a higher numerical aperture.

A single-layer DVD can store 4.7 Gbyte, which is around seven times as much a standard CD-ROM The DVDs may have one or two sides, and one or two layers of data per sides; the number of sides and layers determines the disc capacity.