ExpertEasy1 markMultiple Choice
AQA GCSE · Question 04.1.1 · Cell Biology
The diagram shows a simplified microscope.
What is the function of part A?
The diagram shows a simplified microscope.
What is the function of part A?
Answer options:
A.
To adjust the focus of the microscope
B.
To direct light into the viewer's eye
C.
To hold a slide in place
D.
To magnify the image of a specimen
E.
To support the microscope
How to approach this question
Identify part A on the diagram. It is pointing to the knobs on the side of the microscope arm. Recall the function of these knobs when using a microscope.
Full Answer
A.To adjust the focus of the microscope✓ Correct
To adjust the focus of the microscope
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. There is usually a coarse focus for initial focusing and a fine focus for sharp, detailed focusing.
- **B: Mirror/Light source.** This directs light up through the specimen on the slide so that it can be seen.
- **C: Objective lens.** This is one of the lenses that magnifies the image of the specimen. Microscopes usually have several objective lenses with different magnifications.
Common mistakes
✗ Confusing the focus knob with the objective lens or the light source.
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