Hardware Quiz #49: Part Two-Cd Burners
When a Cd Burner "writes" on the blank CD-R, it basically burns (or darkens) the material of the CD-R. What does the darkened area represent?
Answer: a. 0's
The write laser moves in exactly the same way as the read laser: It moves outward while the disc spins. The bottom plastic layer has grooves pre-pressed into it, to guide the laser along the correct path. By calibrating the rate of spin with the movement of the laser assembly, the burner keeps the laser running along the track at a constant rate of speed. To record the data, the burner simply turns the laser writer on and off in synch with the pattern of 1s and 0s. The laser darkens the material to encode a 0 and leaves it translucent to encode a 1.