The diagram shows a simplified microscope.

What is the function of part B?

Answer options:

To adjust the focus of the microscope

To direct light into the viewer's eye

To hold a slide in place

To magnify the image of a specimen

To support the microscope

How to approach this question

Identify part B on the diagram. It is pointing to the mirror at the base of the microscope. What is the purpose of this part in a light microscope?

Full Answer

B.To direct light into the viewer's eye✓ Correct

The parts of the microscope shown are: - **A: Focus knobs.** These are used to move the stage up and down to bring the specimen into focus. - **B: Mirror/Light source.** This directs light up through the specimen on the slide so that it can be seen. Without a light source, the image would be dark. - **C: Objective lens.** This is one of the lenses that magnifies the image of the specimen.

Common mistakes

✗ Confusing the function of the mirror with magnification or focusing.

Question 04.1.1 All questions Question 04.1.3

Practice the full AQA GCSE Biology Foundation Tier Paper 1

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