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Diffraction grating of CD/DVD

  1. Mar 3, 2014 #1

    I have to do an experiment in which I will investigate the diffraction grating of a CD
    and a DVD. I want to find out the spacing of tracks on both of them and thus find how much information can be stored. Also I want to compare them (density of tracks etc.) and maybe even suggest further improvements to optical disks.

    Is there anything else I could find out in this experiment? Perhaps some mathematical relationship?


  2. jcsd
  3. Mar 3, 2014 #2


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  4. Mar 3, 2014 #3
  5. Mar 4, 2014 #4


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    Or a pin-hole in a dark room; coherent light sources existed prior to the invention of the laser!

    Any distant, steady source when introduced via a pinhole should work. For example, the sun, or a gas discharge tube.
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