Question

Define optical disc and its types ? ​

Answer 1

An optical disc is an electronic data storage medium that can be written to and read from using a low-powered laser beam. There are three main types of optical media: CD, DVD, and Blu-ray disc. CDs can store up to 700 megabytes (MB) of data, and DVDs can store up to 8.4 GB of data.

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Answer 2

What is meant by optical disc?

A disk with a plastic coating on which information (such as music, visual images, or computer data) is recorded digitally (as in the form of tiny pits) and which is read by using a laser.

What are its types?

An optical disc is designed to support one of three recording types: read-only (e.g.: CD and CD-ROM), recordable (write-once, e.g. CD-R), or re-recordable (rewritable, e.g. CD-RW).

Examples:

Examples of this media are compact disk read-only memory (CD-ROM), digital versatile disk read-only memory (DVD-ROM), digital versatile disk random access memory (DVD-RAM), write-once read-many (WORM) cartridges, erasable optical cartridges, and Removable Mass Storage (RMS) media which are removable disk (RDX).