A-LevelBiologyCell structure9700/12 · May/June 2010 · Q131 Mark
The diagram shows a stage micrometer, with divisions 0.1 mm apart, viewed through an eyepiece containing a graticule. [Figure 13.1] What is the area of the field of view of the microscope at this magnification? (π = 3.14)
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.
Aπ × 12.5 × 12.5 = 4.9 × 10² µm²
Bπ × 55 × 55 = 9.5 × 10³ µm²
Cπ × 125 × 125 = 4.9 × 10⁴ µm²
Dπ × 250 × 250 = 2.0 × 10⁵ µm²
✓ Correct answer
C: π × 125 × 125 = 4.9 × 10⁴ µm²
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