Exam-style question
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Define electron microscopes and optical microscopes. What is the key difference between them?.
Model answer
What a good answer should say
- Electron microscopes use electrons to illuminate the specimen, allowing for much higher resolution than optical microscopes, which use visible light.
- The key difference is that electron microscopes can achieve resolutions below 1 nanometer, while optical microscopes are limited to around 200 nanometers due to the wavelength of visible light.
Explanation
Why this works
This question tests the understanding of the fundamental differences between two types of microscopes. By defining both and identifying their key difference, students demonstrate their grasp of the concepts and their applications in microscopy.
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