Table of Contents
What is the structure of CD?
In CDs, the data and metal layers are very close to the top of the disc (label side); in DVDs, they are in the middle of the disc (see Figures 1Ð6). The types of data and metal layers used depend on the type of disc-read-only (ROM), write-once (R), or rewritable (RW, RAM).
What is compact disk explain types?
Tip. CD is also called as Compact Disk which is easily used for data storage and also portable from one place to another. Explanation. CD is a circular compact disk which is used to store data capacity that ranges between 650-700 MB. A CD have separate disk to store and rewrite that is to read and to write.
How does a compact disc work?
It takes a very precise laser beam focused on the data track as the CD spins rapidly around. The laser beam passes through the polycarbonate layer and reflects off the aluminum layer. As it does so, a sensor detects changes in the laser beam’s reflection, since the bumps cause the laser to reflect differently.
How does a compact disk work?
What are the two types of CD?
Generally, there are two types of CDs available – Compact disc-recordable or CD-R and Compact disc-rewritable or CD-RW.
What are the advantages of compact disk?
7. Compact Disks
| Advantages of CDs | Disadvantages of CDs |
|---|---|
| Small and portable | Fairly fragile, easy to snap or scratch |
| Very cheap to produce | Smaller storage capacity than a hard drive or DVD |
| Most computers can read CDs. If there is no CD drive, a DVD drive can usually read them | Slower to access than the hard disk. |
What is the definition of a compact disc?
Compact disc. Written By: Compact disc (CD), a molded plastic disc containing digital data that is scanned by a laser beam for the reproduction of recorded sound and other information.
How much data can a compact disc hold?
As we mentioned above, compact discs are used to store data so that may be retrieved or executed at a later date. The standard CD is capable of holding 72 minutes of music or 650 MB of data. There were several types of storage media released before a CD.
When did the compact disc first come out?
Compact disc, a molded plastic disc containing digital data that is scanned by a laser beam for the reproduction of recorded sound and other information. Learn more about the history of the compact disc, starting with its commercial introduction in 1982.
How big is a standard Compact Disc player?
compact disc manufacturingA standard compact disc (CD) is 120 mm (4.75 inches) in diameter and 1.2 mm (0.05 inch) thick.© Baloncici/Dreamstime.com. The DVD player uses a laser that is higher-powered and has a correspondingly finer focus point than that of the CD player.
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