Physics 0625 · IGCSE · Light

Light — practice question

(a)[2]

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.

(b)[2]

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.

(c(i))[1]

Describe how the object is positioned relative to the lens.

(c(ii))[1]

Describe where the image is positioned relative to the lens and the object.

(c(iii))[2]

Give three properties of the image produced by a magnifying glass.

Worked solution & mark scheme

This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: On the left of the lens, both rays remain straight; the upper ray turns clockwise and the lower ray turns anticlockwise

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