Which technology is used in compact disk to store data?

by

(A) Electrical
(B) Mechanical
(C) Electromagnetic
(D) LASER

🧠 Explanation:

  • Compact Disks (CDs) use LASER technology to read and write data.
  • A low-power laser beam is directed onto the surface of the disk to detect tiny pits and lands that represent digital data.
  • These pits and lands reflect the laser light differently, allowing the system to interpret the stored binary information.
  • This optical method of data storage is both precise and efficient, making LASER the correct technology used in CDs.