BLURAYDISC
Blu-ray Disc
Blu-ray Disc is a digital optical disc data storage format designed to supersede the DVD format. The plastic disc is 120 mm in diameter and 1.2 mm thick, the same size as DVDs and CDs. Conventional Blu-ray Discs contain 25 GB per layer, with dual layer discs being the industry standard for feature-length video discs. Triple layer discs and quadruple layers are available for BD-XL re-writer drives. The name Blu-ray Disc refers to the blue laser used to read the disc, which allows information to be stored at a greater density than is possible with the longer-wavelength red laser used for DVDs. The major application of Blu-ray Discs is as a medium ...The above text is a snippet from Wikipedia: Blu-ray Disc
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