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1 Overview. 2 Characteristics. 3 Interleave. ... In the compact disc system, ... (2.5 mm in length as seen on CD surface) ...
The conical plate centrifuge is used to remove solids (usually impurities) from liquids or to separate two liquid phases from each other by means of an enormously high centrifugal force. The denser solids or liquids which are subjected to these forces move outwards towards the rotating bowl wall while the less dense fluids moves towards the centre.
The program area is 86.05 cm 2 and the length of the recordable spiral is 86.05 cm 2 / 1.6 μm = 5.38 km. With a scanning speed of 1.2 m/s, the playing time is 74 minutes or 650 MiB of data on a CD-ROM. A disc with data packed slightly more densely is tolerated by most players (though some old ones fail).
8.1 30 cm (Full-size) 8.2 20 cm ("EP"-size) ... and pit length code for PCM sound information. ... It was typical for each disc to start with the disc catalog (a few ...
English: Comparison of various characteristics of a Compact Disc, and single-layer Digital Versatile Disc, High-Definition/Density Digital Versatile Disc and Blu-ray Disc. Dimensions indicated are track pitch (p), pit width (w) and minimum length (l), and laser spot size (⌀) and wavelength (λ).
A typical magnetic region on a hard-disk platter (as of 2006) is about 200–250 nanometers wide (in the radial direction of the platter) and extends about 25–30 nanometers in the down-track direction (the circumferential direction on the platter), [citation needed] corresponding to about 100 billion bits per square inch of disk area (15.5 ...
Dual-layer recording allows DVD-R and DVD+R discs to store significantly more data, up to 8.5 gigabytes per disc, compared with 4.7 gigabytes for single-layer discs. DVD-R DL was developed for the DVD Forum by Pioneer Corporation, while DVD+R DL was developed for the DVD+RW Alliance by Philips and Mitsubishi Kagaku Media (MKM).
Stacks of compact disc jewel cases. Optical disc packaging is the packaging that accompanies CDs, DVDs, and other formats of optical discs.Most packaging is rigid or semi-rigid and designed to protect the media from scratches and other types of exposure damage.