Discussion
An electron microscope achieves higher resolution than a light microscope because electrons
Answer: D
Correct answer: have a much shorter wavelength than light
An electron accelerated through 100 kV has a wavelength of a few picometres, some hundred thousand times shorter than visible light, and since the diffraction limit scales with wavelength the attainable resolution improves accordingly. In practice lens aberrations keep electron microscopes well short of that theoretical figure, but they still resolve to atomic dimensions.
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