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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.
What else can I help you with?
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.
What are the flat spots on a CD called?
The flat spots on a CD are called pits and lands. These pits and lands are etched onto the surface of the CD to store digital information in the form of binary code.
The surface of a CD stores data as pits and?
Lands
On a CD the area that separates the pits is a mountain?
Flats, or 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
How is information stored and recived from a CD?
Information on a CD is stored as tiny indentations, or pits, on the surface of the disc, which represent binary data. A laser in the CD player reads these pits and the flat areas between them (lands) as it spins the disc. The variations in reflection caused by the pits and lands are converted into electrical signals, which are then processed to retrieve the stored information, such as music or files. This process allows for accurate data retrieval and playback.
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
