Chapter/Index: Introduction | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Appendix
| There are some apertures in electron microscopes. The figure below shows how the first aperture in electron gun filters electrons.
Figure 4956. First Aperture in Electron Gun
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