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When I am looking with my sunglasses to PC display I see darker

  1. Jul 7, 2011 #1
    When I am looking with my sunglasses to PC display I see darker image.Then I turn my head 45 degrees and I do not see anything.Why?
     
  2. jcsd
  3. Jul 7, 2011 #2

    f95toli

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    Re: sunglasses

    Because the light from the screen is polarized (I am assuming it is an LCD) , and you are using polarizing sunglasses.
    Tilting your head is therefore analogous to crossed polarisers, it will block all light.
     
  4. Jul 9, 2011 #3
    Re: sunglasses

    ok so my cheap sunglasses(6 euros) are polarized.
    But then if I do the same with my wife glasses really expensive (200 euros)D§G i do not see any effect.Are they not polarized?
     
  5. Jul 9, 2011 #4

    davenn

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    Re: sunglasses

    possibly not

    D
     
  6. Jul 10, 2011 #5
    Re: sunglasses

    Wouldn't it make a difference if you tilt your head up or down 45 degrees instead of left or right 45 degrees?
     
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