Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar
    Science Advisor
    Gold Member

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


    User Avatar
    Science Advisor
    Gold Member

    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.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Diffraction grating of CD/DVD
  1. Diffraction Grating ? (Replies: 2)

  2. Diffraction grating (Replies: 1)

  3. Diffraction Grating (Replies: 2)

  4. Diffraction Gratings (Replies: 4)