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21 February, 18:33

Dvd discs use a blue laser to record data as opposed to original cds that use a red laser. consequently, dvd discs can store much more information on them than cds. this is possible because

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  1. 21 February, 18:50
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    The laser on a dvd disc operates at a higher frequency then the laser on a cd drive and allows the data to be more tightly packed on the disc
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