Computer Science for IGCSE & O level - Hardware (Section 13 - No. 49)
Which of the following features is most significant in increasing the storage capacity of Blu-ray discs compared to DVDs?
A larger disc diameter.
A dual-layer construction.
A shorter wavelength laser.
A higher rotational speed.
Explanation
The shorter wavelength laser allows for smaller pits, and a higher storage density.
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