Multiple choice general knowledge science & technology

Which of the below media types hold the most information?

  1. Blu-ray

  2. CD

  3. DVD

  4. Floppy diskette
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A Correct answer
Explanation

Blu-ray discs have the highest storage capacity among the options listed. A standard Blu-ray disc holds 25 GB (single-layer) or 50 GB (dual-layer). By comparison, DVDs hold 4.7 GB (single-layer) or 8.5 GB (dual-layer), CDs hold 700 MB, and floppy diskettes hold only 1.44 MB. Blu-ray uses blue-violet laser technology with a shorter wavelength (405 nm) than DVDs' red laser (650 nm), allowing for more data storage on the same disc size.

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