COMPUTER HARDWARE COMPONENTS FUNCTIONS
COMPUTER OUTPUT DEVICES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Compact Disc (CD)
|
|
|
Blu-ray Disc (BD)
|
|
|
Digital Video Disc (DVD)
|
|
|
None of the above
|
Detailed explanation-1: -The term “Blu-ray” comes from the blue laser used to read and write to the disc. The Blu-ray discs can store much more data then CDs or DVDs. A dual layer Blu-ray disc can store up to 50GB, almost six times thecapacity of a dual layer DVD (WOW!).
Detailed explanation-2: -The name “Blu-ray” refers to the blue laser (which is actually a violet laser) used to read the disc, which allows information to be stored at a greater density than is possible with the longer-wavelength red laser used for DVDs.
Detailed explanation-3: -BD-R discs can be written to once, whereas Blu-ray Disc Recordable Erasable (BD-RE) can be erased and re-recorded multiple times.
Detailed explanation-4: -Blu-ray Disc recordable (write once) media is identified with grey trim on the packaging and the BD-R designation. Currently, 50GB and 25GB capacity Blu-ray Disc media is available in both the BD-RE rewriteable and BD-R recordable formats. The 50GB capacity media are Dual Layer.
Detailed explanation-5: -A disc in the DVD format can currently hold 4.7 gigabytes of data. Unlike DVD technology, which uses red lasers to etch data onto the disc, the Blu-ray disc technology uses a blue-violet laser to record information.