Exam-style question
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Why are electron microscopes preferred for observing nanostructures?.
- A.They use visible light to illuminate samples.
- B.They can achieve higher magnifications than optical microscopes.
- C.They are less expensive to operate.
- D.They require less sample preparation.
Model answer
What a good answer should say
- They can achieve higher magnifications than optical microscopes.
Explanation
Why this works
The cause is that electron microscopes utilize electrons, which have much shorter wavelengths than visible light. The mechanism is that this allows them to resolve much smaller features due to the wave-particle duality of electrons.
The effect is that electron microscopes can achieve magnifications that are orders of magnitude higher than optical microscopes. The consequence is that researchers can visualize and analyze nanostructures that are critical in fields like materials science and biology.
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