Exam-style question
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How does the de Broglie wavelength relate to electron microscopy?.
- A.It determines the charge of the electrons.
- B.It affects the resolution of the microscope.
- C.It indicates the speed of the electrons.
- D.It defines the energy levels of electrons.
Model answer
What a good answer should say
- It affects the resolution of the microscope.
Explanation
Why this works
The cause is that the de Broglie wavelength of electrons is inversely proportional to their momentum. The mechanism is that shorter wavelengths allow for the resolution of smaller details in the specimen.
The effect is that electron microscopes can achieve much higher resolutions than optical microscopes. The consequence is that finer details can be observed, enhancing our understanding of material structures.
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