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ltthao
Davis, CA

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    December 2007 2 1
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    ltthao's Reviews

    Sony DVD-R

    Sony DVD-R
    4 star rating
    Good Media Disk
    pc-user, a PC user, quality conscious, pc user, Every day computer user, carry lots of data around, heavy user of CDRs, dvd buff

    DEC
    19
    2007
    The larger storage capacity of a DVD-R compared to a CD-R is achieved through smaller pit size and smaller track pitch of the groove spiral which guides the laser beam. Consequently, more pits can be written on the same physical sized disc. In order to write smaller pits onto the recording dye layer a red laser beam with a wavelength of 650 nm (for general use recordable DVD, versus a wavelength of 780 nm for CD-R) is used in conjunction with a higher numerical aperture lens. Because of this shorter wavelength, DVD-R and DVD+R use different dyes from CD-R to properly absorb this wavelength.
    D
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    4 star rating
    DEC
    19
    2007
    Texas Instruments - TI-83

    Texas Instruments - TI-83

    Don't use blown batteries, they will fry the electronic device.

    D
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    busy person, carry lots of data around, dvd buff, dvd collector, every day computer user, heavy user of cdrs, into music, open minded, pc user, person who enjoys quality, quality conscious, simple is good
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    Jolie
    Chicago, IL

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