COMPUTER HARDWARE
STORAGE DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Bumps and Flat Surfaces
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Magnetic 1s and 0s
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Tiny Holes that light shines through
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Tiny 1s and 0s printed on the disc
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Detailed explanation-1: -An optical disc is a flat, usually circular disc which encode binary data in the form of pits and lands on a special material on one of its flat surfaces. The lands represent “1” and the pits represent “0” in binary computing.
Detailed explanation-2: -An optical disk drive uses a laser beam to read the data from the disk as it is spinning. It distinguishes between the pits and lands based on how the light reflects off the recording material. The drive uses the differences in reflectivity to determine the 0 and 1 bits that represent the data.
Detailed explanation-3: -Optical discs are made of a polycarbonate base covered by a thin layer of aluminum. The disc is then coated with a clear acrylic material for protective purposes. During the manufacturing process, the disc’s surface is embossed with tiny bumps. This series of bumps form one long, single, spiral track.