1. The problem statement, all variables and given/known data Image: http://i.imgur.com/NMS7BUK.jpg?1 a) Find the position of the final image of the 1.0-cm-tall object. b) Find the size of the final image of the 1.0-cm-tall object. h = 1 cm f1 = 5 cm do = 4 cm f2 = -8 cm L = 12 cm di = ? 2. Relevant equations 1/f = 1/do + 1/di 3. The attempt at a solution a) di1 = 1/(1/f1 - 1/do) = 1/(1/5cm - 1/4cm) = -20 cm (virtual image through a converging lens?) di2 = 1/(1/f2 - 1/(l - do)) = 1/(1/-8cm - 1/(12-(-2))) = -6.4 cm This answer is not right. I would really appreciate any help with double lens systems. We're covering them now in class, and I'm very confused by optics!