A) A certain slide projector has a 100 mm-focal (f) length lens. (a) How far away is the screen if a slide is placed 103 mm from the lens and produces a sharp image at d_i?

B) A certain slide projector has a 100 mm-focal (f) length lens. (b) If the slide is 24.0 by 36.0 mm, and using the information from the previous question, what are the dimensions of the image?

Use the magnification m = -d_i/d_o