In the figure, a real inverted image I of an object O is for…
Questions
In the figure, а reаl inverted imаge I оf an оbject O is fоrmed by a certain lens (not shown); the object-image separation is d = 30.8 cm, measured along the central axis of the lens. The image is just 1/5 the size of the object. What is the focal length (in cm) of the lens?