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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'.
What else can I help you with?
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.
Why cant you play a Blu-ray DVD on a regular DVD system?
Cause DVDs and Blu-Ray discs are different formats and they each a different laser to read the disc. But the lasers in Blu-Ray players can also read 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.
Why are DVD drives capable of reading CDs?
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.
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 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.
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.
Will you be able to watch Blu-ray DVD on your PC with regular DVD drive if you install Blu-ray playing software?
Well the drive has to be a Blu-Ray drive for Blu-Rays require a certain laser in order to play and DVD players do not have that laser, but the Blu-Ray laser can detect and read DVDs
Do DVDs and LCDs have magnets?
DVDs do not contain magnets; they use a reflective surface and are read by a laser. LCDs (liquid crystal displays) may contain small magnets in their speakers or other components, but the display itself relies on liquid crystals and backlighting rather than magnetism.
Does Mac OS play DVDs?
Yes it does, as long as your drive can read DVDs.
How can Blu-ray discs hold more information?
The "Blu" in blu-ray refers to a short-wave blue laser used to read the disc, which allows information to be stored at a greater density than is possible with the longer-wavelength red laser used for DVDs.
What impact have LASERs had on human life?
Quite a lot. In developed countries, hardly a home DOESN'T have laser equipment. (Reminder: both CDs and DVDs use laser.) Lasers are also used for certain surgeries, for precision measurements, and for other purposes. You may want to read the Wikipedia article on "Laser" for more details.
