Experiment 11: Thin Lenses The goal of this lab is to explore formation of images by thin lenses. Theory For a thin lens with focal length f , it can be shown that 1 1 ' F=F+i {1] where do and d,- are the object and image distances respectively. This is called the thinlens equation. The object distance is measured from the object to the lens, and the image distance is measured from the image to the lens. In this equation. the focal length f should be taken with sign "plus" in the case of converging lens and with the sign \"minus" in the case of diverging lens. The object distance do is positive number corresponding to the object position to the left of the lens. The image distance d,- found from the lens equation could be either positive or negative number. Distance di>0 corresponds to the image positioned to the right of the lens (real image}. whereas d,