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!

Ray tracing concave mirror

  1. Nov 27, 2014 #1
    1. The problem statement, all variables and given/known data
    mirrorq.png
    B) Using the mirror equation, find the image distance.

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

    3. The attempt at a solution
    mirrorrays.png

    B)
    do = 2cm f = 4cm
    1/do + 1/di = 1/f
    1/di = 1/f - 1/do
    1/di = do/f(do) - f/f(do)
    1/di = (do-f)/(f*do)
    di = (f*do)/(do-f) = (4cm * 2cm)/(2cm - 4cm) = (8cm^2)/(-2cm) = -4cm
    di = -4cm

     
  2. jcsd
  3. Nov 27, 2014 #2
    is it ok that my image distance came out negative? if i am correct this is fine if the image is behind the mirror
     
  4. Nov 28, 2014 #3

    ehild

    User Avatar
    Homework Helper
    Gold Member

    It is correct, the distance of a virtual image is negative in the frame of sign convention you applied.
     
  5. Nov 28, 2014 #4
    thank you!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Ray tracing concave mirror
Loading...