COMPUTER HARDWARE
STORAGE DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Very fast data transfer rate
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Cheaper
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doesn’t requires special player
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Data access speed is greater than other optical media
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Detailed explanation-1: -A DVD is a standard definition device. You won’t get high-definition movie viewing on your DVD, just 480 SD. On the other hand, Blu-ray is made for HD, and you’ll get the best picture possible, with 1080 HD capability for your Blu-ray movies. So if you are looking for a quality picture, Blue Ray is the clear winner.
Detailed explanation-2: -The Blu-ray disk has emerged as clear leader in today’s optical storage market. Unlike CDs and DVDs, which use a red laser to read and write data, a Blu-ray disk uses a blue laser, which dramatically increases capacities and data transfer rates over CDs and DVDs.
Detailed explanation-3: -A blue-violet laser, emitting at a wavelength of 405 nanometres, reads the pits. Because the laser used in a Blu-ray is of a shorter wavelength than that used in DVDs (635 or 650 nanometres), the spiral track can be more tightly wound. Thus, the Blu-ray disc can hold more information than the DVD.
Detailed explanation-4: -Because of its shorter wavelength (405 nm), substantially more data can be stored on a Blu-ray Disc than on the DVD format, which uses a red, 650 nm laser. Originally Blu-ray Disc could store 25 GB on each layer, and now they can hold 100 GB.