red n with blue ray disk blue
red
A CD drive uses an infrared laser to read the data. An ultraviolet ray is used in Blu-Ray players, which gives them a much higher storage capacity.
The laser in the drive is the device that actually reads or writes data from and to the CD/CDRW/CDR.
A small rig moves a laser along the CD, the laser reads binary data from the grooves in the CD and the drive's software interprets the results.
A laser is used to alter the internal metal alloy layer of the CD-RW. The strength of the laser can be varied and this allows the alloy to be manipulated and the data on the CD to be changed.
The laser inside the CD/DVD optical drive does the scanning.
a red laser like a CD
No. There are a number of different reasons. It can range from speed of the drive, and by far the most important reason is that a DVD use a blue laser, and CD use a red laser.
Whenever your CD drive closes it queries by spinning and reading with the laser. It detects it by reading some of the data off of it.
I would expect red unless it is a blu-ray (that is blue)
A CD ROM or DVD drive
The laser drive (optical drive), is the generic term for the CD, DVD or blueray drive. They all use laser light to read (and record) the discs.