About Blu-Ray Media and DevicesBlu-ray discs (BD) use a blue-violet laser, which has a shorter wavelength than the red laser used in DVDs.
Maka ntụle, Blu-ray na HD-DVD na-eji teknụzụ Blue Laser (nke nwere ntụgharị oge dị mkpirikpi karịa teknụzụ laser uhie dị na DVD ugbu a).