Computer Science for IGCSE & O level - Hardware (Section 6 - No. 10)
How is data stored on a DVD compared to a CD?
DVD uses a single layer, whereas CD uses multiple layers.
DVD uses smaller pits, allowing for more data storage.
DVDs are physically smaller than CDs.
CDs use a blue laser and DVDs use a red laser.
Giải thích
DVDs use smaller pits and tracks than CDs, which leads to more storage.