Laser Beam

  • Thread starter ah lai
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  • #1
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Information is stored in a series of pits on the disc. These pits are scanned by a laser beam. An significant limitation on amount of information that can be stored on a disc is width of laser beam.

I knew why the width of laser beam is important coz diffraction effect of loght.

But, i dunoe how using shorter-wavelength laser allows more information to be stored on disc of same size......HOW???
 

Answers and Replies

  • #2
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Well, the diffraction effects you mentioned, do they depend on wavelength? ;)
 

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