1. Not finding help here? Sign up for a free 30min 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!

A lens and a convex mirror problem

  1. Jun 25, 2011 #1
    1. The problem statement, all variables and given/known data
    A body is positioned 40 cm from the left of a lens (f=30) and the lens is positioned 100cm left of a convex mirror (|R|=60), where will be the image and what type and magnitude will it have?


    2. Relevant equations
    1/u + 1/v = 1/f


    3. The attempt at a solution
    I tried to calculate the image after the lens - and got v = 120 cm.

    Now, I don't know how to interpret the answer.
    Can anyone help me out on this?

    Thanks
     

    Attached Files:

  2. jcsd
  3. Jun 25, 2011 #2

    rl.bhat

    User Avatar
    Homework Helper

    The convex mirror interrupt the rays to form the real image.
    So (120 - 100) = 20 cm becomes the virtual object distance for the convex mirror. Now proceed.
     
  4. Jun 25, 2011 #3
    That's my problem, now it is considered concave?
     
  5. Jun 25, 2011 #4

    ehild

    User Avatar
    Homework Helper
    Gold Member

    You can consider the mirror concave, and find the image distance that way, or you take it convex and use negative object distance.

    ehild
     
    Last edited: Jun 25, 2011
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: A lens and a convex mirror problem
  1. Convex Mirrors Problem (Replies: 4)

  2. A Convex Lens problem? (Replies: 4)

Loading...