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Convex mirror

  1. Jan 27, 2010 #1
    When dealing with convex mirrors I know that the image will always be virtual,upright and diminished. So when im using descartes's formulae i know that for convex mirrors that the focal length is negative, but does my 1/di become negative? because virtual images have a negative height and distance.

  2. jcsd
  3. Jan 28, 2010 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Yes, the image distance is negative for a convex mirror. (This follows directly from the spherical mirror equation.)
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