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Question

A beam of light used to record and retrieve data on optical disk is known as _________________.

A
polarized light
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B
unpolarized light
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C
laser
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D
coloured light
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Solution

The correct option is C laser

A beam of light used to record and retrieve data on optical disk is known as laser.

An optical disc drive is a disc drive that uses laser light or electromagnetic waves within or near the visible light spectrum as part of the process of reading or writing data to or from optical discs.

Optical storageis the storage of data on an optically readable medium. Data is recorded by making marks in a pattern that can be read back with the aid of light, usually a beam of laser light precisely focused on a spinning optical disc.


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