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Lands
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∙ 14y ago
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∙ 15y agolands
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What do CD's use to store data on the disks surface?
Pits and lands
Which side of the CD contains the data?
although many people think it is the bottom or "shiny" side, it's actually only a plastic holder the data is kept on the side that the title and/or graphics has been printed. it's true, i found out the hard way!
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 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.
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.
Are CD-RWs as stable as CDs?
No, because in a CD-RW the pits and flats that make up the data are constantly being changed, which means the disc's surface has to be much more flexible and impermanent.
Why is a DVD able to store 4.3GB of data even though it is the size of a normal CD?
Single layer recordable DVD's can store 4.3GB of data. Data is stored on CD's and DVD's via reflective and non reflective pits on the surface of the media. These "dots" are much smaller on DVD's which gives you more room to store information on the surface of the disc. Dual Layer DVDs hold 8.5GB. The pits on a DVD are much smaller and closer together than those on a CD. The new BlueRay disks can pack the pits even closer together because the blue light used to read them has a smaller wavelength and hence is able to resolve smaller details on a disks surface. CDs are read by a red or infrared light which has a much longer wavelength and is not able to resolve smaller pits on a disks surface.
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 data represented on optical discs?
All digital data is represented as one's and zero's. The actual physical representation of data on an optical disc - assuming you are talking about CD's - is called pits and lands. This article from a 1990 Stereophile article explains much of the mechanics of a CD surface: http://www.stereophile.com/reference/590jitter/
What is like a CD-ROM but stores more data?
A DVD-ROM stores more information than a CD-ROM.
What is burning of CD?
Burning of a CD means that you laser write data onto the silver surface of the CD.
What is a pitpit?
The recessed area on a CD or DVD where data is stored. CDs and DVDs store data in lands and pits. The lands represent 1 and the pits represent 0 in binary computing. The bits are read by the disc drive that uses a laser beam to distinguish between the lands and pits based on the amount of scattering or deflection that occurs when the beam of light hits the surface of the disc
