Question

How do optical storage devices operate?
Optical storage devices focus a ___
on a disk surface that acts as the storage medium.

Answer 1

In optical storage the data is encoded on the disk in the form of tiny pits that are arranged in the concentric rings.

so the answer should be

Optical storage devices focus a tiny pits in concentric tracks on a disk surface that acts as the storage medium.

I Hope it will help you.