Q: Why do they call it Blu-ray?
A: Because Blu-ray Disc players and PC drives, as well as Sony’s PlayStation 3, use a blue laser beam to read data from discs, rather than the older red lasers used for DVDs. A blue laser can be focused more tightly, so disc makers can pack more data on a disc the same size as a DVD. Blu-ray Discs can hold up to 50 gigabytes, compared to a DVD, which holds less than 10 GB. That added capacity can hold video up to six times the resolution of DVD, plus more bonus features and improved surround soundtracks.
Stay tuned for next weeks question:Q: Can you really see the difference between Blu-ray and DVD?
