Yes, it really is ray not the blue-ray. The letter 'e' was intentionally avoided making it ideal for trademarking. And yes, the Blu-ray is much more advanced and better compared to a DVD. Everyone was excited when DVDs has been around since in 1997 making it possible playing digital audio/video even just in our homes. Now, individuals are referring to the new technology that is even more advanced than DVDs that has been around since in the year 2006.
After VCR's and DVDs, advances in technology brought us Blu-ray technology. The name blu-ray is derived from the reality that a blue (actually blue-violet) laser can be used for reading and writing Blu disc.ray technology is not an achievement of the single company. Several prominent the likes of Apple, Dell, Sony, Sun Microsystems etc formed ray Disc Association which developed fractional laser treatments.
Blu-ray discs can beat DVDs within the following factors:
(a) More storage capacity A single-sided standard 12 cm DVD can store 4.7 GB of internet data whereas exactly the same size single layer ray disc can store 25 GB of knowledge which is almost five times higher than a DVD. A dual layer ray disc can store 50 GB of internet data. Just like DVDs we can get mini size ray discs also with all the size 8 cm. This mini disc with single layer capacity can store 7.8 GB and dual layer capacity can store 15.6 GB.
(b) Higher bandwith rate of 36 Mbps and,
(c) Video and audio are tinkered with more clarity compared to DVD. 
The following are the factors that are responsible to embed more data in a ray disc:
(a) As opposed to DVDs which depend on red lasers operating at 650 nm to read by and writing data, Blu-ray discs depend on blue laser that operates at 405 nm. Because the ray technologies are while using short wavelength laser when compared with DVD, it could embed more data to the disc containing the identical size of a DVD.
(b) The thickness of canopy layer was decreased.
(c) Numerical aperture was increased to 0.85.
Different formats of ray disc:
(a) BD-R: Recordable format for HD videos and PC data storage.
(b) BD-ROM: Read only format for pre-recorded contents like high-definition movies, games.
(c) BD-RW: Rewritable format for PC data storage.
(d) BD-RE: Rewritable format for HD video recording and PC data storage.
The exclusive popular features of Blu-ray players are:
*You can create the playlists.
*You may make changes for the recorded video and shuffle their order.
*You can record high-definition television (HDTV) with improved sound and picture qualities.
*You can record a program while playing a different one.
*The player automatically searches for the empty space to record new programs for the disc in order to avoid overlapping of programs.
*You can randomly go to any point about the disc.
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