What is a compact disc explain?

compact disc (CD), a molded plastic disc containing digital data that is scanned by a laser beam for the reproduction of recorded sound and other information. Since its commercial introduction in 1982, the audio CD has almost completely replaced the phonograph disc (or record) for high-fidelity recorded music.

How does a compact disk store data?

CDs store information digitally, i.e., with the help of millions of 1s and 0s. Data on a CD is encoded with the help of a laser beam that etches tiny indentations (or bumps, if you will) on its surface. A bump, in CD terminology, is known as a pit and represents the number 0.

Why is it called compact disc?

A Compact Disc, also called a CD is a storage device that are small plastic discs which store and retrieve computer data or music using light. Compact Discs replaced floppy disks because they were faster and could hold more information.

What is DVD explain?

DVD stands for Digital Versatile Disc. It is commonly known as Digital Video Disc. It is a digital optical disc storage format used to store high capacity data like high quality videos and movies. It is also used to store operating system.

What is the capacity of CD?

With a storage capacity of 680 megabytes, the CD-ROM found rapid commercial acceptance as an alternative to so-called floppy disks (with a maximum capacity of 1.4 megabytes).

Which technology is used in compact disc?

Compact Disks are thin and circular data storage devices that uses optical laser technology. A semiconductor laser diode is used from which a beam of laser light is emitted to read and write the information (data or music), when the compact disc rotates on the player.

How do DVDs work?

DVD (digital video disc) is a technology based on optical data storage similar to compact disc (CD). Analog information is converted into digital information, which is then encoded onto the disc from the inside edge out. Digital data are encoded by means of pits on the recording layer of the disc.

What are the functions of DVD?

DVD, in full digital video disc or digital versatile disc, type of optical disc used for data storage and as a platform for multimedia.

Who invented compact disc?

James Russell
Compact disc/Inventors
Compact Disc – Complete History of the Compact Disc (CD) The first workable digital compact disc device, the precursor on now ubiquitous CD/DVDs, was invented in the late 1960s by the American physicist James Russell.

What is the function of DVD?

Stands for “Digital Versatile Disc.” A DVD is a type of optical media used for storing digital data. It is the same size as a CD but has a larger storage capacity. Some DVDs are formatted specifically for video playback, while others may contain different types of data, such as software programs and computer files.