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Optics help

  1. Oct 15, 2005 #1
    a man is standing with his back facing a large drawing of 5m long, and his front facing a plane mirror.the mirror is placed at eye level, to enable him to see the image of the drawing.what is the minimum length of the plane mirror if he were to see the whole image of the drawing?

    1)2m

    2)2.5m

    3)3m

    4)4m
     
  2. jcsd
  3. Oct 15, 2005 #2

    Doc Al

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    Staff: Mentor

    Show what you've figured out so far. (Hint: A 5m tall object a distance x in front of a plane mirror will appear in the mirror as a 5m tall object a distance x behind the mirror.)
     
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