Timeline for CD
- alex added the fact data capacity is 650 MB. 2007-11-19 21:06
- alex added the fact read by focusing a 780 nm wavelength semiconductor laser through the bottom of the polycarbonate layer. 2007-11-19 21:06
- alex added the fact spacing between the tracks, the pitch, is 1.6 μm. 2007-11-19 21:06
- alex added the fact data is stored as a series of tiny indentations (pits), encoded in a tightly packed spiral track molded into the top of the polycarbonate layer. 2007-11-19 21:06
- alex added the fact is made from a 1.2 mm thick disc of almost pure polycarbonate plastic and weighs approximately 16 grams. 2007-11-19 21:06
- alex added the fact audio format is a two-channel 16-bit PCM encoding at a 44.1 kHz sampling rate. 2007-11-19 21:06
- alex added the fact a disc with a diameter of 115 mm. 2007-11-19 21:06
- alex added the fact the capacity was set to 74 minutes to accommodate a complete performance of Beethoven’s 9th Symphony. 2007-11-19 21:06
- alex added the fact originally developed for storing digital audio. 2007-11-19 21:06
- alex added the fact an optical disc used to store digital data. 2007-11-19 21:06
- alex added the fact audio capacity is 74 minutes. 2007-11-19 21:06
- alex created the term CD. 2007-11-19 21:06
alex