- #1
ah lai
- 5
- 0
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.
How using shorter-wavelength laser allows more information to be stored on disc of same size??
Any website i can refer to ? Thanks!
I knew why the width of laser beam is important coz diffraction effect of loght.
How using shorter-wavelength laser allows more information to be stored on disc of same size??
Any website i can refer to ? Thanks!