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a laser is used to read the information on the bottom of the disk

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16y ago

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How does a red laser to read dvds differ from blue-violet laser?

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'.


Are there any CD players that also play DVDs?

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.


Describe at least 4 users for lasers?

Laser targetting on weapons, Laser eye surgery, Visual entertainment at pop concerts, reading CDs/DVDs


Can PlayStation 3 games run on a PlayStation 2?

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.


Is there more cds than DVDs?

Yes their is more cds than DVDs


What is laser used in CD and DVD?

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.


Are CDs and DVDs magnetic disks?

No. A CD is a type of optical media. An example of magnetic media would be tape (eg. VHS and cassette)


What are industrial applications for lasers?

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.


What is the ratio of cds to dvds in simplest form collection of 24 cds and 18 dvds?

4 to 3


Which storage device uses laser beams to read and write?

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.


What bis the storage media used by optical disc drives?

DVDs or CDs


What is the DVD drive?

The DVD Drive is a drive that is used for reading CDs or DVDs.