Optical Devices Flashcards
1
Q
How do optical devices work
A
Optical devices use a laser to scan the surface of a spinning disc made from metal and plastic.
2
Q
The disc surface is divided into
A
tracks
3
Q
Each track contains
A
many lands(flat surface) areas and pits(hollow)
4
Q
When the laser shines on the disc surface
A
land reflects the light back, whereas pits scatter the laser beam.
5
Q
types of optical media
A
Rom media, Read media, and Read/write media
