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The metal disc used to make a coin is called a "coin blank" or, more formally, a "planchet." They also used to be called "flans," but that term is no longer as widely used.
magnetic storage
they are called pixels
Condensation
pixels
vescles
CD data is stored as a series of tiny indentations known as "pits", encoded in a spiral track molded into the top of the polycarbonate layer.
dents
The triangular indentations used for the script of Sumerians is called cuneiform.
Dimples
Dimples.
possible
The DVD was a development rather than an invention. It was a high density version of the Compact Disc that was the first of the low cost optical storage devices. Similarly, the Bluray disc is a higher density version of the DVD. The CD itself was a development of optical technologies with low power highly controllable lasers and plastics molding allowing CDs to be printed with accurate, tiny indentations. However, as the CD was the first of its kind, it can certainly be called an invention and so was the invention that lead to the DVD and then the Bluray discs.
scratches are indents in the disc or where a tiny part of the disc is gone. they cannot be taken off, for they are not a physical object attached to the disc.
Advantages - NoneDisadvantages - TINY TINY TINY Storage- Rubbish size/storage ratio (size of disc)- they are obsolete surelyI built a new PC and didnt include a disc drive because they are pointlessfor the price of a disc drive you can get a 8 gig USB stick
You mean indentations. A business letter that is not indented is in block from.
If you were to look at the shiny part of a disc under a microscope, you'll see that its covered with little dents (called pits, which are small indentations on the surface). The smooth parts of the disc between the pits are called lands.See image: http://www.sonic.net/~ideas/art_mma3.htm…When a laser is shone on the disc and the disc is spun, the smooth parts of the disc, called the 'lands' bounces the laser back onto the sensor.Everytime this happens, it registers as a "1" in computer binary code.However, as it hits a pit (dent), this disrupts the laser beam and thus the laser misses the sensor in the disc drive.This registers as a "0" in binary code.As the disc spins, a sequence of 1's and 0's is produced by the 'pits' and "lands" is produced. The computer analyzes this code and then turns it into data.