A lens has a focal length of 120 cm and a magnification of 4.0. How far apart are the object and the image?
I used the thin lens equation 1/f = (1/di + 1/do)^-1 and M = -d image/d object
The Attempt at a Solution
I have been trying this by rearranging the thin lens equation...didnt work. Tried finding di and do given only magnification - cant do with only 1 known variable.
I dont think my approach is right at all. Any help will be appreciated.