Print Production Homework, Due 5/7
1. Identify five different methods of data storage currently in use.
Floppy Disk, Magneto optical, Flash drives, File servers, and MP3 players
2. What principle is used by compact disks for writing and reading binary data?
Is a principle called pitch, during data encoding, a laser in the CD writer burns changes the intensity of the light reflecting from the laser. This light intensity is measured by a photodiode that interprets reflected light intensity as binary coding.
3. Describe three major differences between CDs and DVDs.
a. DVDs transfer data in 1,352 Kbps while CDs transfer data in 150Kbps
b. A shorter-wavelength laser is required to read a DVD data tracks, so the disk platter is thinner than a CDs’ so that the light doesn’t have to travel through so much plastic to reach the disk’s data layer.
c. DVDs are made to hold full-length movies using MPEG-2 codes, while CDs are made to store and play back high quality stereo analog audio files