letermine d and do; determine the mag- nification M from M = h./h : determine M prod from d, and d (Eq. 2); and deter- mine the focal length f from d and d. Eq. 1). Continue on at Comprehension Ques- tions 3 leaving the optical components as they are currently arranged with the oh- ject, lens, and screen arranged to produce a reduced, real image on the screen