what is so different about a blu-ray disk?
March 19th, 2010 | 
Author: it doesn’t sound that great. I think people could live without it. It sounds like regular disks are easier to take care of.
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it is more high tech and can hold alot more then dvds and hd dvd like 3 times hd dvds
resolution , storage capacity n interactivity.
blu-ray is able to hold more data on a single disc 25gb for single layer, and 50 for dual layer its a new hd data format made by sony which is getting boosted by the ps3 (reason they put bluray in the ps3)
A blu-ray disk is read by a blue laser which has a higher frequency, making it possible to make it thinner than a red laser with a higher frequency, so you can put much more data on a blu-ray disk.
Data on regular disk l l l l l l l l l l l l l l l l
Data on blu-ray disk IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII It is more compact so you need a smaller laser to read it.
Because the Blu-ray Disc standard places the data recording layer close to the surface of the disc, early discs were susceptible to contamination and scratches and had to be enclosed in plastic caddies for protection. The consortium worried that such an inconvenience would hurt Blu-ray Disc’s market adoption. Blu-ray Discs now use a layer of protective material on the surface through which the data is read.
The recent introduction of a clear polymer coating has given Blu-ray Discs substantial scratch resistance. The coating is developed by TDK and is called “Durabis”. It allows BDs to be cleaned safely with only a tissue. The coating is said to successfully resist “50 grit sandpaper scrubbing” according to Samsung Optical technical manager Chas Kalsi. [citation needed]
Both Sony and Panasonic replication methods include proprietary hard-coat technologies. Sony’s rewritable media are sprayed with a scratch-resistant and antistatic coating. Verbatim recordable and rewritable Blu-ray Disc discs use their own proprietary hard-coat technology called ScratchGuard.
[suppose to be the best ever-
With your 7-Foot home theater screen, you will not be able to zoom in to the skinpore level unless you are using a blu-ray disk player. Or if you only have enough space on your disk storage shelf for one more disk, then you are going to need that 25-50 Gb and you should invest in a blu-ray setup.