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    suren25's Avatar
    suren25 Posts: 1, Reputation: 1
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    #1

    Sep 21, 2011, 03:27 PM
    Why does DVDs stores more data than CDs?
    Why does DVDs stores more data than CDs?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Sep 22, 2011, 03:21 AM
    DVDs has two layers where data can be stored, whereas CDs have only one layer.
    phillysteakandcheese's Avatar
    phillysteakandcheese Posts: 973, Reputation: 356
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    #3

    Sep 22, 2011, 08:31 AM
    The capacity difference is due to the laser used in the devices to read/write data on the disc.

    The "beam size" of a DVD laser is much smaller than that of the CD. For blue-rays dics, the beam gets even smaller.

    There's lots of info on the net with technical details of this. For more, try starting at:
    Optical disc - Wikipedia, the free encyclopedia
    darkvision's Avatar
    darkvision Posts: 232, Reputation: 15
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    #4

    Sep 28, 2011, 07:19 AM
    Was going to say try the wiki, but the gist is a number of things, different materials of the disk, better encoding onto the disk, better laser read/write technology. Also as far as blue rays go if I'm not mistaken they also use the same technology that our hard drives do for read/write(its a mathematical formula that allows for much denser information storage) the guys that came up with it got the nobel for it.
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