Do you know Blu Ray DVD?

One of the paid to blog assignment was about Playstation 3, the popular video game console that is priced at $500.

While gathering technical information for the article, I came across an online shopping mall where it is offered with free 5 Blu-ray DVDs.

I thought I must first learn what is Blu-ray DVD and here is what I learnt. A Blu-ray Disc (also called BDray) is a high-density optical disc format for the storage of digital information, including high-definition video.

And what is High Definition (HD) video. High-definition video generally refers to any video system of higher resolution than standard-definition (SD) video, most commonly at display resolutions of 1280x720 (720p) or 1920x1080 (1080i or 1080p).

Back to Blu-ray disc, it got its name from the blue-violet laser used to read and write this type of disc. Because of its shorter wavelength, substantially more data can be stored on a Blu-ray Disc than on the DVD format, which uses a red laser. A single layer Blu-ray Disc can store twenty-five gigabytes (G.B.), over five times the size of a single layer D.V.D. at 4.7 GB.