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Why can i see hidden image with a polarized spec?

  1. Oct 26, 2008 #1
    Hi, i can't find any article related to this question, i went to a spectacle shop, they claim their spectacle are polarized, i tested it by diagonally aligned the spectacles and yes it is polarized, but then sales man asked me to put on the spec and have a look at a picture.

    First it was just a fisherman with a rod but with my spec i can see a fisherman with a rod and a fish. I wonder how this happens? Anyone could answer me pls? Thanks.
  2. jcsd
  3. Oct 26, 2008 #2
    Perhaps the picture was covered in polarizing film, oriented differently for the fish.
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