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CD VERSUS DVD PIT SIZE COMPARISON
Compared to CD, DVD uses smaller pits and a more closely spaced track. The result is a significant increase in data density. The higher Numerical Aperture (NA) lens of DVD helps the laser focus on the smaller pits.
Almost every aspect of DVD was developed, refined or reinvented to achieve the seven-fold increase in data capacity and data density. Refinements include smaller pit dimensions, a more closely-spaced track (finer "track pitch"), and a shorter-wavelength laser.
Conventional CD Players and CD-ROM drives use a laser that emits invisible, infrared light at the wavelength of 780 nanometers. The new DVD Players and DVD-ROM drives use a laser that emits red light at 650 and 635 nm. The shorter wavelengths are better suited to reading the smaller, more densely packed pits. The laser assembly has also been refined with a higher Numerical Aperture (NA) lens, resulting in a narrower, more tightly focused laser beam.
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How are the pits and flats arranged on a CD?
The pits and flats are arranged in a spiral pattern on the CD. These pits and flats are found on the bottom edge of the CD and are the grooves that include data.
How do a CD drive interface with a PC?
A CD has microscopic pits and ridges that a CD drive can read. In order to read these pits, the drive has a laser that fires at the bottom of the CD and detects those pits and ridges. It then sends that raw data to the computers proccesser or motherboard, which decodes the data into a form the computer can use.
On a CD the area that separates the pits is a mountain?
Flats, or lands.
The surface of a CD stores data as pits and?
Lands
What do CD's use to store data on the disks surface?
Pits and lands
What are the words used to describe where info is stored on a CD?
Pits and lands
How does a CD player read a CD?
The CD disc is a 'sandwich' of a thin layer of metal and plastic. (The metal is the 'meat' - the plastic is the 'bread'. The metal layer has music recorded on it by a laser - which creates microscopic 'pits' in the surface. The CD player has a (less powerful) laser - which reads the pits - and converts the data into music.
Are the pits and the flats on a CD are examples of information stored as a digital signal?
True
What CD did huanted bumps by insane clown posse come out on and what year was it?
The tempest 2007
What does CD DVD- rw dual layer mean?
dual layer means there are layers of pits and lands on the dvd
What side of a CD is read?
CD are made of two parts plastic and polycarbonate (the shiny part) the bottom side is just plastic and the top side is where all the data it. The CD drive uses a laser that reads the polycarbonate through the plastic. So you look at the top part of the CD and its missing some of the polycarbonate your definitely going to get skips.
How is digital information stored on compact?
as pits and landsInformation is stored in bits on a CD. Bits are stored as a sequence of 0s and 1s.
