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Convex Mirrors

  1. Apr 27, 2009 #1
    1. Shiny lawn spheres placed on pedestals are convex mirrors. One such sphere has a diameter of 40 cm. A 12 cm robin sits in a tree 1.5 m from the sphere.
    a) Where is the image of the robin?
    b) How long is the robin's image?




    2. 1/f = 1/do + 1/di



    3. a. 1/f = 1/do + 1/di
    di = dof/1/f = do - f
    = 150(10)/ 150 -10
    = 10.71 cm
    b. m = hi/ho = di/do
    hi = ho (di/do)
    = 12(-10.71/150)
    = -0.857 cm
    I'm not sure if this is right.
     
  2. jcsd
  3. Apr 28, 2009 #2

    rl.bhat

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    Homework Helper

    Focal length of the convex mirror should be taken as negative.
     
  4. May 3, 2009 #3
    Thank You!!
     
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