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Homework Help: Dispersion or diffraction.

  1. Sep 22, 2011 #1
    1. The problem statement, all variables and given/known data


    When i see the back of a CD or DVD, there is a spectrum, in which the various colours are overlapping with each other(continuous spectrum)
    2. Relevant equations


    What is the reason for this phenomenon, diffraction or dispersion?
    3. The attempt at a solution
    Diffraction means bending of light around the edges of obstacles and Dispersion is splitting of white light into its constituent colours or wavelength.
    I presume the tracks and sectors present in CD or DVD acts as slits and rulings akin to grating element. Am i correct? Pls help revered members.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 22, 2011 #2

    ehild

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  4. Sep 27, 2011 #3
    Thanks a lot ehild
     
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