Media Players 101: What is Blu-ray?
Blu-ray players and discs use technology that allows you to watch high-definition video. Blu-ray takes its name from the blue laser that is used to read the disc. The laser, which has a shorter wavelength intended for smaller areas, reads data that is encoded in microscopic pits and bumps on the digital disc's surface. This advancement allows the pits that store data to be half the size of those on DVDs, meaning a Blu-ray disc can fit about five times as much data than a standard DVD and store larger, high-resolution movies or videos.
Benefits of Blu-ray