On completion of this tutorial you should be able to:
- explain to someone with A-level physics how a TEM works and how it forms a) an image and b) a diffraction pattern;
- name the essential components of a TEM and define the meaning and significance of important terms such as; bright field, dark field, convergence, coherence, aberrations, distortion, spot size...
- explain the operation of electromagnetic lenses in terms of ray diagrams, including the origin of chromatic and achromatic aberrations;
- explain to a materials undergraduate how images arise from diffraction, phase contrast and high angle annular dark field mechanisms, as typified by images of dislocations, lattice images and structure images.
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