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Unformatted text preview: wavelength of the illumination times the fnumber of the objective ( fnumber = focal length divided by the objective diameter). What is the theoretical resolution of an electron microscope with fnumber = 32 that uses 100 keV electrons? Use the result nm 1.221 / p h for a 1 eV electron and forget the relativistic correction. (a) 0.12 nm; (b) 0.34 nm; (c) 0.56 nm; (d) 0.78 nm; (e) 0.90 nm. What do you know? nm 1.221 / p h for a 1 eV electron so a 100,000 eV electron has a wavelength equal to nm 00386 . 100000 nm/ 1.221 . Multiply by the fnumber to get a resolution of 0.123 nm....
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 Spring '04
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 Diffraction

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