Blu-ray or Blu-ray Disc (BD) is a digital optical... - dofaq.co
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Blu-ray or Blu-ray Disc (BD) is a digital optical...

wikipedia - 12 Sep 2015
Blu-ray or Blu-ray Disc (BD) is a digital optical disc data storage format. It was designed to supersede the DVD format, in that it is capable of storing high-definition (720p and 1080p) and ultra high-definition video resolution (2160p). The plastic disc is 120 mm in diameter and 1.2 mm thick, the same size as DVDs and CDs. Conventional (pre-BD-XL) Blu-ray Disc discs contain 25 GB per layer, with dual layer discs (50 GB) being the industry standard for feature-lengt

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