Scanning Electron & Transmission Electron Microscope

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1. Both types of EM use some sort of metal coating, therefore how do you explain that one type (transmission) produces a two dimensional image and the other type (scanning) produces a three dimensional image."

Transmission electron microscope (TEM): In the TEM, an electron beam is passed through a very thin (~0.1 micrometres) specimen and the "image" is detected on a phosphorescent screen or on photographic film. In order to achieve such thin ...