Question

what is blue ray disk

Answer 1

Hi here is your answer
Blu-ray or Blu-ray Disc is a digital optical disc data storage format. It was designed to supersede the DVD format, and is capable of storing several hours of video in high-definition and ultra high-definition resolution. 

Released: 20 June 2006; 12 years ago

Block size: 2 KB sector, 64 KB ECC-block

Developed by: Sony Corporation, Blu-ray Disc Association

Answer 2

Blu-ray or Blu-ray Disc is a digital optical disc data storage format. It was designed to supersede the DVD format, and is capable of storing several hours of video in high-definition and ultra high-definition resolution.
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