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How do you store data on a disc?
CDs and DVDs both use a storage technique called optical storage. The data is stored on the discs by burning microscopic holes on the exterior of the disc, invisible to the naked eye. CD and DVD readers then perceive these holes as data and displays it to the user or computer. This is why you "Burn" something onto a CD/DVD.
Can laser light reached at moon and can reflect back?
Yes. The moon's high albedo is used as a mirror to reflect laser light from the Earth. They more accurately track the orbit and distance of the moon than previous methods. However, in order to have a reflected laser beam that the eye could see (like in a movie) the laser would have to be incredibly strong and have a large beam. No laser currently on Earth is capable of this. However, the moon's albedo is high enough that if such a significantly large laser existed it could reach the moon and be reflected back.
Where can you find a laser?
sun is one place there can be laser but it can also be ultraviolet rays
Who invented the laser disc?
The first commercial laser disc was made by the Philips company
What is the Lunar Laser Ranging experiment?
The Lunar Laser Ranging experiment is the ongoing meaurement of the distance between planet Earth and the moon. The measurment is calculated by using a laser.
How is a laser used in CD's and DVD's?
a laser is used to read the information on the bottom of the disk
What is the main difference between DVD and CD?
a CD is 700 megabytes and uses an infrared laser. a DVD is about 4.5 gigabytes and uses a red laser commercially Dvd's are for movies and new software and Cd's are used for music and older software
Two characteristics give a DVD more storage than a CD?
The DVD uses a different laser with a smaller wavelength, not the long wavelength red laser that is used for CD's. I believe the DVD laser is in the ultraviolet spectrum. Anywho, the smaller laser allows the DVD to have smaller "bumps" (which is what the laser reads). Since they are smaller, more can fit onto a disk. Also, DVD's can be 2-layer. Twice the data.
Are CD's and DVD's magnetic?
CD's and DVD's are not magnetic. They are optical storage devices that are read with LASER beams.
Can you convert CD burner into DVD burner?
No. The laser in a CD burner is too wide to write to a DVD properly.
What scans the CD?
The laser inside the CD/DVD optical drive does the scanning.
What color laser beam does a DVD drive use?
a red laser like a CD
Can dvds be used in CD devices explain?
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.
Can DVD's be used in a CD device?
No! The eye is only formatted to TT2 CD device (CD's) U can play CD's in a DVD device.
Why CD devices can not read DVD?
I'm not an engineer, but while lasers are used to read both CD's and DVD's, the required laser is different. I suppose it is due to the frequency that the laser is reading. Anyway, DVD's are about 3 times tighter packed than CD's, so the CD's laser can't focus in on the data. This is why if you tried to store a movie on CD (using the CD-i format, for example), you would end up with 3 or 4 CD's compared to one DVD.
How are CD and DVD technologies read?
There are micro craters that a laser "reads"
Why did they invent the LASER?
They invented the L.A.S.E.R because the laser helps to read stuff off of CD's and DVD's.
