In Fig. 7.1, a converging lens produces a sharp image of object O on a screen. Add the missing paths of the two rays from the object to the screen.
In part (a), the converging lens is swapped for a thinner converging lens. The object O and the screen stay in the same positions as in (a). The thinner converging lens has a longer focal length than the converging lens in (a). Complete the paths of the two rays from the object to the screen in Fig. 7.2.
Describe how the object is positioned relative to the lens.
Describe where the image is positioned relative to the lens and the object.
Give three properties of the image produced by a magnifying glass.