A Level Computing - Optical Disc

List the processes undergone to read data from an optical disc
Quiz by shellgon26
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Last updated: November 5, 2018
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First submittedNovember 5, 2018
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Answer
The disc is comprised of flats and pits in rings, called tracks
A laser is passed over the tracks as the disc spins
The pits do not reflect light
The flats reflect light back to an opto-electric sensor
Answer
The opto-electric sensor detects the change in light
and transmits a signal back
The process is repeated for each track, until all data has been read
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