Electron microscope

Type of microscope with electrons as a source of illumination

An electron microscope is a microscope that uses a beam of electrons as a source of "illumination". It uses electron optics that are analogous to the glass lenses of an optical light microscope to control the electron beam, for instance focusing it to produce magnified images or electron diffraction patterns. As the wavelength of an electron can be more than 100,000 times smaller than that of visible light, electron microscopes have a much higher resolution of about 0.1 nm, which compares to about 200 nm for light microscopes.

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