MAM-A 25GB Blu ray 2x No Logo Unbranded in 50pk

The key technology behind the Blu-ray disc is the blue laser, which has a wavelength of only 405nm (billionths of a meter). DVDs use a pure red laser with a wavelength of 650nm, and CDs use a 780nm wavelength infra-red laser. The benefit of having a blue laser with a shorter wavelength means it is possible to write smaller data pits, and significantly increase the amount of data stored on a disc.