Science (086) — AI-generated practice question

(i) Ray Diagram:

Object is placed between F₁ and O (since object distance 6 cm < focal length 10 cm).

```
|
\ | /
\ | /
─────\──┼──/─────── Principal axis
\ | /
\|/
O F₁ (lens) F₂
(6cm) (10cm) (10cm)
```

Draw two rays from the top of the candle: one parallel to the principal axis (refracts through F₂), and one through the optical centre (passes straight). The refracted rays diverge; when extended backwards, they meet on the same side as the object, forming a virtual, erect, enlarged image.

(ii) The image is formed in front of the lens (same side as the object). It is virtual, erect, and enlarged (larger than the object).

(iii) No, this image cannot be obtained on a screen, because it is a virtual image. Virtual images are formed by the apparent intersection of diverging rays and cannot be projected onto a screen.

Source: Chapter 9, Section 9.3.4 & 9.3.5

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• The key fact: object distance (6 cm) < focal length (10 cm), so the object lies between F and O. From Table 9.4, this always gives a virtual, erect, enlarged image on the same side as the object.
• Examiners award marks for: correct identification of object position → correct image characteristics → correct reason for screen question.
• Virtual images cannot be caught on a screen — this is the standard one-line reason required.
• For the ray diagram, show at least two rays and the image on the same side as the object (dotted lines for virtual rays).