Question

What is the difference between cd,dvd,blu-ray?

Answer 1

Cd(Compact Disc)- It is similar to the one you buy at a music store. A single disc can store more than 600MB of data I.e. equivalent to 400 floppy disks. CDs can be read through CD ROM drive. The speed of a CD ROM drive determines how fast a disc spins. With faster speed, a disc can transfer information to computer more quickly.

DVDs(Digital Versatile Disc)- DVDs are similar to CDs but can hold visual displays like movies or large amount of data. DVD drive is able to read DVDs as well as CDs. A DVD disc has a storage capacity starting from 4.7GB up to 8 GB which is equivalent to 6 CDs.

Blu-ray Disc- Blu-ray Disc- is an optical storage medium designed to supersede the DVD format. The standard physical medium is a 12 cm plastic optical disc, the same size as DVDs and CDs. Blu-ray Discs contain 25 GB per layer, with dual layer discs(50 GB) the norm for feature-length video discs and additional layers possible in the future.

Answer 2

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