Y is d compact disk glitterin wit the spectrum colours on one of its sides?

Answer 1

The disc is covered with a transparent coating so that it can be read by a laser beam.

Normal CDs can not be modified -- they are read-only devices. A CD-R disc needs to allow the drive to write data onto the disc. For a CD-R disk to work, there must be a way for a laser to create a non-reflective area on the disc. A CD-R disc therefore has an extra layer that the laser can modify. This extra layer is a greenish dye. In a normal CD, you have a plastic substrate covered with a reflective aluminum or gold layer. In a CD-R, you have a plastic substrate, a dye layer and a reflective gold layer. On a new CD-R disc, the entire surface of the disc is reflective -- the laser can shine through the dye and reflect off the gold layer.

When you write data to a CD-R, the writing laser (which is much more powerful than the reading laser) heats up the dye layer and changes its transparency. The change in the dye creates the equivalent of a non-reflective bump. This is a permanent change, and both CD and CD-R drives can read the modified dye as a bump later on.

It turns out that the dye is fairly sensitive to light -- it has to be in order for a laser to modify it quickly. Therefore, you want to avoid exposing CD-R discs to sunlight.

Answer 2

Cuz it b jammin and layin down da cool

Answer 3

B coz uh reflekshun fum duh shiny stuf.
It are not smoov, cuz uz der laser pitz in it, sew it reflecks der lit at difrunt wavelenfs. It are called diffraction, but i carn't spell it...

Answer 4

Why can't you spell?