COMPUTER ARCHITECTURE
MEMORY SYSTEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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RAM
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Blu Ray Disc
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Hard Disk
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None of the above
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Detailed explanation-1: -A Blu-ray disk is an optical storage device similar to CD and DVD technology. It also uses a laser to read and write to the disk, but instead of a red laser beam, as used in DVD and CD, it uses a blue-violet laser beam.
Detailed explanation-2: -An optical drive is composed of a laser that’s used to read and write data that’s encoded in a plastic disc which spins on a platter. Depending on the specific kind of optical drive-CD, DVD or Blu-ray-the wavelength of the laser will vary, along with the rotational speed of the disc.
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.