There are mainly two types ofThe transmission electron microscope (TEM): was the first electron microscope to be developed. It works by shooting a beam of electrons at a thin slice of a sample and detecting those electrons that make it through to the other side. The TEM lets us look in very high resolution at a thin section of a sample.The scanning electron microscope (SEM):The scanning electron microscope (SEM) lets us see the surface of three-dimensional objects in high resolution. It works by scanning the surface of an object with a focused beam of electrons and detecting electrons that are reflected from and knocked off the sample surface.Other two types are:3. CryoSEM: It is a specialised form of SEM thatu2019s good for looking at things that contain moisture (such as plants or food). In cryoSEM, samples are frozen in liquid nitrbefore being viewed.4. Electron backscatter diffraction (EBSD) is used to look in detail at the structure of minerals (such as those in rocks). Rather than being microscopes in their own right, EBSD detectors are add-ons to SEMs.