Blu Ray vs Normal Optical Disc

Blu Ray

• The typical Blu-Ray discs contains 25GB per layer. A Blu-Ray disc has the ability to store high-definition video with up to 1080p resolution.

• The name "Blu-ray" refers to the blue laser used to read the disc, which allows information to be stored at a greater density than it is possible with the longer-wavelength red laser used for DVDs.

• Tructurally similar to DVD and CDs with measurements of 120 mm in diameter and 1.2 mm thick.

• Blu ray is capable of storing high-definition video resolution.

• Blu Ray is a type of digital optical disc data storage format. It was made to be a better version of DVD.

Normal Optical Disc

• Capacity is lesser in comparison to Blu-Ray. CD data is represented as tiny indentations known as "pits", encoded in a spiral track moulded into the top of the polycarbonate layer. The areas between pits are known as "lands". Each pit is approximately 100 nm deep by 500 nm wide, and varies from 850 nm to 3.5 µm in length. The distance between the tracks, the pitch, is 1.6 µm.

• can hold up to about 80 minutes of uncompressed audio or about 700 MiB of data.

• The format was originally developed for storage and the playing of sound recordings but it was later adapted for the storage of data as we know today CD-ROM.

• Like the Blu Ray disc, it serves as a similar function but except at a lower capacity.