- #1
ccrook
- 14
- 0
I was wondering if someone could offer an explanation as to why TEMs and SEMs have practical resolutions several orders of magnitude less than what is predicted by the Rayleigh Criterion. This of course comes from my own calculations of the Rayleigh Criterion assuming an electron is accelerated by 300kV and 10 kV field respectively and correcting for relativity in the electron's speed. In the TEM case, I found the electron wavelength to be approximately 2e-12 m and the SEM 1.2e-11 m, which are much smaller than 0.5 angstrom and 50-100 nm observed. Thank you!