Microscopy Resolution · Histology

Why does an electron microscope have a significantly higher resolution than a light microscope?

  1. Electrons travel faster than photons
  2. The wavelength of an electron beam is much shorter than visible light
  3. Electron microscopes use multiple ocular lenses
  4. Vacuum chambers effectively prevent all forms of light and particle scattering
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Correct answer: The wavelength of an electron beam is much shorter than visible light

The resolution of any microscope is limited by wavelength. Since high-velocity electrons have wavelengths thousands of times shorter than visible light photons, they can resolve structures at the atomic and molecular level.

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