What is Blu-ray?
By rwhwilliam, 15th Nov 2010 | Follow this author
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Posted in WikinutReviewsTechnologyHome Video
Does it have something to do with the color Blue??
Bluray
Ever wonder what that means? Dues the color blue have anything to do with it? It actually does! While a regular DVD uses a red laser to read data from a disk, a blu-ray device uses a blue laser. A blue laser has a much shorter wavelength (405 nanometers), over its red cousin (650 nanometers). This allows a huge increase in data in the same amount of space. Additionally transfer rates on Blu-ray disks are up to three and a half times those on DVD’s! This allows for more detail and higher quality videos. Additionally Blu-Rays are a more secure media for the film industry with its encryption system.
Uses
Blu-rays have more uses than just the film industry. Because of more compact data a Blu-ray disk can hold up to 27 Gigabytes of data on a single layer disk. Double the layers, and you get a whopping 54 Giga bytes and research is believed to soon unlock double that! This allows you to completely backup your computer files in only a few disks opposed to stacks of DVD’s. All these benefits come at a cost though. Despite advances in manufacturing, Blu-rays are more expensive than conventional DVD’s.
Are Blu-rays worth the extra cost? They provide better pictures, and a vast media to store tons of data. It really depends on your needs.
Comments
15th Nov 2010 (#)
Even though we've known about bluerays for a while now this was very informative!Lots of people still don't know what they are all about. I'm sure someday in the near future Blue-ray will be the standard disc everyone uses
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