CAT laser
You can find lasers in various devices such as laser pointers, CD/DVD players, barcode scanners, and medical equipment. Additionally, lasers are commonly used in industrial applications, defense systems, and scientific research.
Compact discs (CDs) are made of polycarbonate material and have a reflective metal layer where data is stored as tiny pits or dark spots created by a laser. When the CD is read by a laser in a CD player, the pits reflect light differently, allowing the player to interpret the data encoded on the disc.
The first laser was built by Theodore H. Maiman in 1960 at Hughes Research Laboratories. The laser used a ruby crystal as the gain medium and produced a red laser beam.
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.
A laser compact is a portable device that emits a concentrated beam of light through the use of a laser diode. It is commonly used for various applications such as pointing, leveling, or measuring distances. Laser compacts are small in size and easy to carry around.
a laser is used to read the information on the bottom of the disk
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
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.
CD's and DVD's are not magnetic. They are optical storage devices that are read with LASER beams.
The laser inside the CD/DVD optical drive does the scanning.
No. The laser in a CD burner is too wide to write to a DVD properly.
a red laser like a CD
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.
No! The eye is only formatted to TT2 CD device (CD's) U can play CD's in a DVD device.
There are micro craters that a laser "reads"
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.
Generally, it's an infrared laser, although some use a visible light laser but those are generally just for playback purposes. The infrared is mainly used for burning disks as well.