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Old 12-13-2004, 08:33 PM   #1
achilles achilles is offline
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Default What is "Numerical aperture" ?
Can somebody explain to me what is "Numerical aperture" which has been changed to 0.85 in Blu-ray and is 0.65 in HD-DVD? :? What is this in normal DVD and why does it make a difference in storage?

I am writing a paper on optical media and I need to mention this.

Thanks for your help in advance
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