Edexcel IGCSEPhysicsGeneral Applications6 Marks
A converging lens has a focal length of 10 cm. An object is placed 15 cm from the lens.
- (a)Draw a ray diagram to show the formation of the image. You should draw two principal rays to locate the image. [Figure 1][3]
- (b)Describe the nature of the image formed.[3]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme. The mark or mark type is shown in brackets.
- 4(a)
- B1 for ray parallel to principal axis passing through F (on opposite side)
- B1 for ray passing through optical centre (undeviated)
- A1 for correct image position, size, and orientation (inverted and magnified, beyond 2F)
- 4(b)
- B1 for real
- B1 for inverted
- B1 for magnified
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