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/ MacWorld: Complete Mac Interactive / Macworld Complete Mac Interactive CD)(1994).iso / Handbook Interactive / How CD-ROM Works Movie (.mp4) < prev    next >
Apple QuickTime movie  |  1994-06-25  |  6.5 MB  |  320x240  |  15fps  |  47 seconds  |  [MooV/TVOD]
Transcription: A CD-ROM uses optical storage technology to store over 600 megabytes. That's nearly 500 floppy disks worth of data. A CD-ROM disk is a sandwich consisting of layers of plastic surrounding an extremely thin layer of reflective aluminum. The CD's information is stored on a narrow spiral track. Under a microscope, the data looks like a set of minute craters and plateaus called pits and lands. The CD-ROM drive's head assembly contains a small It's a small laser that projects a beam of light onto the data track. When the beam hits a pit, very little light is reflected back to the head assembly. Whe ...