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... Usually one buys music CD’s in a shop but in the age of the Internet one can also download music from the World Wide Web.
In order one can take their music with them, one needs a device that is called CD – Burner.
With a CD – Burner one can save their 1MP3’s on a CD. ... CD – Basics
All CDs are made of a polycarbonate substrate, a thin aluminium coating, and a protective outer layer. ...
When a CD – player reads a CD, a laser beam is going over the surface and wherever there’s a bump the light is not reflected. ... Types of CD’s
CD-Recordable and CD-Rewritable are the two most common types of devices on which can be written, either once (in the case of CD-R) or several times (in the case of CD-RW). ... 1 CD – R (CD – Recordable)
Beside the normal layers of a pressed disc the CD – R disc has an extra coating. This coating is green; a normal CD has a plastic substrate core covered with a reflective aluminium or gold coat.
A CD – R has a plastic substrate core, a coloured coat and a reflective gold coat.
When a laser is writing on a CD – R, it heats up the coloured coat and changes its transparency.
Approximate Word count = 994
Approximate Pages = 4
(250 words per page double spaced)
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