The advent of blu-ray technology has led to the introduction of high capacity storage discs to meet the demand cause by the rapid growth of high definition television hdtv .Blu-ray discs get their name from blue laser technology. The shorter wavelength of the laser is the reason it is blue in colour. The blue laser has a wavelength of 405nm compared with the wavelength of 650nm for dvd which utilises red laser technology. The benefit of having a blue laser with a shorter wavelength means it is possible to write smaller data pits and therefore vastly increase the amount of data on the disc.Blu-ray discs offer 3 to 5 times the storage capacity of a standard recordable dvd disc. Enabling the recording. Rewriting and playback of high definition video hd .
The advent of blu-ray technology has led to the introduction of high capacity storage discs to meet the demand cause by the rapid growth of
