Yes.
Laser beams are used to read and write data on CDs and DVDs. Apart from writing on these disks, the laser beam can also be used to erase the data stored or even overwrite the data stored with fresh data depending on the type of disk used.
Red laser is normally used to read CDs while blue-violet laser is used to read DVDs. The reason is that blue-violet is a higher energy laser with a much smaller wavelenght - 650 billionths of a meter -, so the pits on the DVD's can be smaller and closer together than those on the CDs'.
The laser that is in most DVD players can also read CDs, which is why most DVD players can play audio CDs. The laser in straight CD players cannot read DVDs.
Unfortunately, if you've got a cracked CD, chances are it's probably too damaged to be played. CDs are 'read' by laser beams, which means something like a crack would almost certainly disrupt the 'reading' and render playing of the CD impossible. Sorry.
No, tape drives use magnetic means for storing and reading data. Any kind of Compact media, (CDs, DVDs, Blu Ray, etc.) on the other hand, use lasers to read and write data. (Verify that part, someone.)
Because the spaces between the tracks on a CD are wider and thus the tracks can easily be read by the DVD drive's laser, while a CD player cannot read DVDs because its laser is too wide.
Lightscribe was a set of technologies that allowed users to use their optical drives to write data onto optical media (read: CDs and DVDs) as well as produce labels using the same laser diode.
CDs are read from the center hole moving outward towards the outer edge. If a CD doesn't read, the issue could be due to scratches or dirt on the surface, the laser lens being dirty or misaligned, or the CD drive being faulty. Regular cleaning and proper handling can help maintain the CD's readability.
Optical drives are drives such as CD readers and writers. Although the CDs are made using some materials that are hazardous, the finished product is not hazardous. The drives themselves incorporate lasers, which are used to read the CD, or write to it. These are fully enclosed and do not present a hazard to the user. However, if one were to disassemble such a drive and then power the laser it is possible that the laser beam could be hazardous under limited circumstances. But the the drive would not work to read or write CDs, and would effectively have been destroyed.
NO PlayStation 3 games are distributed on Blu-ray Disc, which is read by means of a blue-violet laser with shorter wavelengths than the red laser used for DVDs (on which PlayStation 2 games are made). The PlayStation 2's optical drive only has a red laser, so it is only capable of reading DVDs and CDs. The PlayStation 3 has both blue-violet and red lasers, allowing it to read CDs, DVDs, and BDs.
Laser light is used in CDs and DVDs to read and write data. A laser beam is used to either create pits on a disc's surface (writing data) or to detect the patterns of pits (reading data) as the disc spins. The laser's focused beam allows for precise and fast data access on optical media.
Lasers are used in CDs to read the data encoded on the disc. The laser beam is directed onto the surface of the CD, where it reflects off the data pits and lands. The reflections are then detected and converted into digital information that can be played back as audio or video.