Some glass lenses are converging lenses, and others are diverging lenses.

1. (a)Draw the cross-section of a diverging lens.[1]
2. (b)(i)Fig. 5.1 shows the cross-section of a converging lens, the principal axis and the two principal focuses (focal points) F₁ and F₂ on a full-scale grid. [Figure 5.1] A student places an object of height 2.1 cm at a distance of 3.0 cm from the centre of the lens. Using Fig. 5.1, determine the focal length of the lens. focal length = ........................................................... cm[1]
3. (b)(ii)On Fig. 5.1, draw a vertical arrow of height 2.1 cm that is 3.0 cm from the centre of the lens and label the arrow O. The arrow is the object.[1]
4. (b)(iii)On Fig. 5.1, draw two rays from the tip of the object arrow to find the tip of the image. Draw another arrow to show the image.[3]
5. (b)(iv)Using the image marked on Fig. 5.1 in (b)(iii), determine the linear magnification produced. magnification = ........................................................[2]
6. (b)(v)Explain whether the image of the object is real or virtual.[1]

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