Maximizing Disc Storage: The Impact of Laser Beam Width on Information Capacity

AI Thread Summary
The width of the laser beam significantly impacts the information capacity of discs, as it determines how closely pits can be packed. The diffraction effect of light limits the minimum size of the pits, which directly correlates to the amount of data stored. Using shorter-wavelength lasers reduces the beam width, allowing for smaller pits and increased data density on the same-sized disc. This relationship between wavelength and diffraction is crucial for maximizing storage capacity. Understanding these principles is essential for advancements in disc storage technology.
ah lai
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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?
 
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Well, the diffraction effects you mentioned, do they depend on wavelength? ;)
 

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