In an CD, 0 and 1 are technically called as
| In an CD, 0 and 1 are technically called as
A. dot and dash
B. pit and flat
C. low and high
D. down and up
Please scroll down to see the correct answer and solution guide.
Right Answer is: B
SOLUTION
- A CD-ROM stores information encoded in a plastic-encased spiral track.
- This information is read optically by a non-contact head while the disk spins above it.
- 0's and 1's are technically called pits and flats. This is represented as shown:
To read the information, a low power laser beam reflects from the spiral track to the head as shown:
- The Laser beam passes through the polycarbonate layer of the CD and reflects off the aluminum layer onto the optical sensor.
- The pits and flats reflect light differently than the rest of the aluminum layer and the optical sensor detects these changes.
