Which of the following technology is used in optical disks to store data?

Correct option is B

Laser technology is used in optical disks (such as CDs, DVDs, and Blu-ray discs) to store and retrieve data. Data is written on the disk by burning tiny pits into the surface of the disk using a laser. The laser is also used to read the data by detecting the reflections from these pits.
Important Key Points:
1. Optical disks store data by using a laser to burn pits into the surface, representing binary data (0s and 1s).
2. When reading data, the laser shines onto the disk, and the reflected light is interpreted to retrieve the stored information.
Knowledge Booster:
· Magnetic Field: Used in magnetic storage devices such as hard drives and magnetic tapes, not in optical disks.
· Electrical Charge: This is used in flash storage devices, not in optical disks.
· Capacitive Touch: Related to touchscreens, not optical storage.
· UV Rays: Not used in the technology for optical disk storage.