waecE-LEARNING
Physics Paper 2, Nov/Dec. 2011  
Questions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Main
General Comments
Weakness/Remedies
Strength
















Question

    List two:
    (a)     types of waves, other than light, that can be plane polarized;
    (b)     methods of polarizing an unpolarized light.

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comments

  This question on light waves was popular among the candidates and was well attempted
  The expected answers are:
    (a)  Waves other than light that can be plane polarized
            Radio waves
            X  - rays
            § – rays
             Ultraviolet rays
              Infrared rays.
   (b)    Methods of polarizing an unpolarized light
             -   Reflection(from smooth surface)
              -  Double refraction(through crystals)
              -   Selective absorption(in certain crystals)
               -   Scattering (by small particles)
               -    Polaroid.


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