CIE iGCSE Co-Ordinated Science B2.2 Size of specimens Exam Style Questions Paper 2
▶️ Answer/Explanation
Magnification is calculated by dividing the image size by the actual size. Here, the measured length in the photograph is 17 mm and the actual length is 12 mm. So, \(\text{Magnification} = \frac{17}{12} \approx 1.416\), which rounds to 1.4.
✅ Answer: (C)
✅ Answer: (C)
Question
The length of an insect in a photograph is measured as 17 mm. The actual length of the insect is 12 mm. What is the magnification of the insect in the photograph?
A. ×1.2
B. ×1.3
C. ×1.4
D. ×1.5
▶️Answer/Explanation
Answer: C. ×1.4
Explanation: Magnification is calculated using the formula: \[ \text{Magnification} = \frac{\text{Image size}}{\text{Actual size}} \] Substituting the given values: \[ \text{Magnification} = \frac{17 \, \text{mm}}{12 \, \text{mm}} \approx 1.4 \] Therefore, the magnification is ×1.4.