explain the writing and reading mechanism on CD ROM Drive
Answers
Explanation:
A CD-ROM (/ˌsiːdiːˈrɒm/, compact disc read-only memory) is a pre-pressed optical compact disc that contains data. Computers can read—but not write to or erase—CD-ROMs.
CD-ROM
CD-ROM.png
A traditional CD-ROM
Media type
Optical disc
Encoding
Various
Capacity
194 MiB (8 cm), 650–900 MiB (12 cm)
Read mechanism
600-780nm laser diode, 150 KiB/s (1×), 10,800 KiB/s (72×)
Write mechanism
Pressed mold
Standard
ISO/IEC 10149[1]
Usage
Data storage
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Answer:
When reading a CD-ROM, a low power laser beam is focused on the rotating CD-ROM and its reflection is viewed by the read head. When the beam reflects back from the CD- ROM, it's intensity changes as it moves from "land" to "pits". These variations in the laser beam are decoded as data by the CD-ROM drive.
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