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: Convex Mirror / Virtual Image

  1. Mar 18, 2010 #1
    1. The problem statement, all variables and given/known data
    The virtual image produced by a convex mirror is one-quarter the size of the object.
    b) What is the focal length of this mirror?

    2. Relevant equations

    1/di = 1/f - 1/do

    3. The attempt at a solution
    i found di to be -9.3 cm but when i solved for f i keep getting it wrong. Help!! (and -9.3 is correct so thats not the problem)
  2. jcsd
  3. Mar 18, 2010 #2


    User Avatar
    Homework Helper

    Can you show your calculations?
  4. Mar 18, 2010 #3
    i did 1/-9.3 = 1/f - 1/37 (do) then solved for f
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook