COMPUTER SCIENCE AND ENGINEERING
COMPUTER ARCHITECTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How can BlueRay disks hold more data than CD or DVD disks?
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the frequency of light used is higher, hence smaller pits are created
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the frequency of light used is lower, hence smaller pits are created
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the frequency of light used is lower, hence largr pits are created
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The disks are larger and contain more material
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Explanation:
Detailed explanation-1: -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-2: -Rather than using a red laser, a Blu-ray disk uses a blue laser, which significantly increases capacities and data transfer rates. Boasting storage of up to 25 GB, the Blu-ray was developed by a consortium that was again led by Sony.
Detailed explanation-3: -DVDs offer significantly higher storage capacity than compact discs (CD) while having the same dimensions. A standard DVD can store up to 4.7 GB of storage, while variants can store up to a maximum of 17.08 GB.
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