Which one of the following is the medium in optical storage system for

Which one of the following is the medium in optical storage system for reading and recording data?

Join Our Telegram Channel

Ultraviolet light

Laser light

Black light

High-energy visible light

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC CISF-AC-EXE – 2024

Download PDF Attempt Online

The correct answer is B) Laser light. Optical storage systems, such as CD, DVD, and Blu-ray drives, use laser beams to read and write data. The laser light interacts with the surface of the disc, reflecting differently off the ‘pits’ and ‘lands’ (or phase changes) that represent the stored binary data.

Optical storage technology relies on the use of focused light, specifically lasers, to interact with the storage medium surface for data retrieval and recording.

Different types of optical media use lasers of different wavelengths. For example, CD drives use red lasers, DVD drives use shorter-wavelength red lasers, and Blu-ray drives use blue-violet lasers, allowing for higher data density. Ultraviolet light, black light (which is also UV light), and general high-energy visible light are not the specific mediums used in standard optical data storage systems.

More similar MCQ questions for Exam preparation:-