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> A blue laser allows reading/writing to a CD/DVD in a much more compact format.
> Thus allowing approximately 4 or 5 times more information to be contained
> on either a CD or DVD.

Yes, actually unless there are special tricks (which also exist), the storage density goes with the inverse square of the wavelength of the light. You can find this explained graphically in the following slide:

http://www.eurotechnology.com/bluelaser/blueslide5.html

Best regards,

foolishlysimple
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