a laser is used to read the information on the bottom of the disk
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.
Laser targetting on weapons, Laser eye surgery, Visual entertainment at pop concerts, reading CDs/DVDs
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.
Yes their is more cds than DVDs
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.
No. A CD is a type of optical media. An example of magnetic media would be tape (eg. VHS and cassette)
Almost any modern home has laser equipment these days. They are used to read and write optical discs, i.e., CDs, DVDs and Blu-ray discs.
4 to 3
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.
DVDs or CDs
The DVD Drive is a drive that is used for reading CDs or DVDs.