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Blu-ray discs require a 405 nm light to read data. As this literally "blue" light is much more dense than the red light used for DVDs, it allows for finer grooves to be made and read in discs. As a result, Blu-ray discs can store 25 GB per layer, compared to the less than 5 GB of the standard DVD.

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  • Blu-ray (Ohga Shrugs)
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  • Blu-ray discs require a 405 nm light to read data. As this literally "blue" light is much more dense than the red light used for DVDs, it allows for finer grooves to be made and read in discs. As a result, Blu-ray discs can store 25 GB per layer, compared to the less than 5 GB of the standard DVD.
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abstract
  • Blu-ray discs require a 405 nm light to read data. As this literally "blue" light is much more dense than the red light used for DVDs, it allows for finer grooves to be made and read in discs. As a result, Blu-ray discs can store 25 GB per layer, compared to the less than 5 GB of the standard DVD.
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