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: Camera lens problem

  1. Sep 1, 2008 #1
    the dimensions of the picture on a 35mm color slide are 24X36 mm,an image of the slide is projected on a screen 9.00 m from the projector lens.the focal length of projectorlens is 150mm.
    1-- how far is the slide from the lens
    2-- what are the image on the screen.

    Plz some body help me...i m not getting any clue
     
  2. jcsd
  3. Sep 1, 2008 #2

    Borek

    User Avatar

    Staff: Mentor

    Do you know lens formula? Do you know intercept theorem?
     
  4. Sep 1, 2008 #3
    yes lens formula is
    1/s + 1/s' = 1/ f
     
  5. Sep 1, 2008 #4

    Borek

    User Avatar

    Staff: Mentor

    Just look at what you know and what you need for the 1st part... Simple algebra.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook