1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Mirrors/Radius of curvature

  1. Sep 17, 2006 #1
    :confused: Can anyone explain what i am doing wrong?
    I thought the radius of curvature is 2 x the distance from mirror..

    A mirror produces an image magnified by 1.5 when your face is 29 cm from the mirror. What is the radius of curvature?

    I thought it would be .29m x 2 = .58m... but that is wrong.. can anyone help?!?
    Last edited: Sep 18, 2006
  2. jcsd
  3. Sep 17, 2006 #2


    User Avatar

    Staff: Mentor

    The radius of curvature of a mirror is a statement about the shape of the mirror. Does a mirror change shape when you move to different distances from it?
  4. Sep 17, 2006 #3
    RE mirrors

    no the mirror doesn't change shape when you move distances from it. the image does... *more hints ...im still lost...
  5. Sep 18, 2006 #4

    Claude Bile

    User Avatar
    Science Advisor

    You need to work out the Radius of Curvature from the magnification.

    Also, Radius of Curvature = 2 x the focal length (f) - so if you can figure out f, then you can figure out the radius of curvature quite easily.

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook