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.
Answer:
If you do not know you are a brain in a vat, you do not have hands.
Explanation:
This premise is plausible as to understand the handless brain which is floating in a vat. The brain is connected to a super computer and it transmits messages to the brain. The brain receives those message and give signals to perform tasks.
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Civil engineers is the correct business
