Question

an ordinary CD(Compact disc ) has how much storage of data?
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Answer 1

Answer:

A standard compact disc measures 4.7 inches, or 120 millimeters (mm), across, is 1.2 mm thick, weighs between 15 grams and 20 grams, and has a capacity of 80 minutes of audio, or 650 megabytes (MB) to 700 MB of data. A CD works by focusing a 780 nanometer wavelength semiconductor laser onto a single track of the disc.

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Answer 2

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➝ An ordinary CD(Compact disc ) has storage of maximum 700 MB.

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Compact Disks :-

• These are readable media of optics.

• It is based on the phonograph disc used in olden days to play music.

• The CD is made of plastic or fibre.

• The circular plastic are coated with the reflecting metal on side.

• A lot of over million-trillion bits are burned into this coating.

There are three types of CDs available :-

CD-R (Compact Disc – Recordable) :-

• These discs can be written only once.

• It can never be ereased.

• These stores permanent data.

CD-ROM (Compact Disk-Read Only Memory) :-

• This disks can be read only once.

• It is just like Read only memory (ROM).

• It cannot be re-updated .

• It is also dependent.

CD-RW (Compact Disc-ReWritable) :-

• This disc can be edited multiple times.

• They can be erased .

• It is also independent.

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