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  SEM ( Scanning Electron Microscope) and TEM (Transmission Electron Microscope) A useful technique for obtaining high-resolution images in a range of fields, such as technology, forensics, and biomedical research, is electron microscopy. Compared to optical microscopes, electron microscopes are able to obtain images with significantly higher resolution, which provides information that would not be possible otherwise. Every electron microscope operates by directing a concentrated stream of electrons toward a sample while they are in a vacuum. Similar to how light is used in optical microscopes to form images, interactions between the electron beam and the material produce images. The resulting image provides information on the internal or external makeup of a sample, depending on the kind of electron microscope that is being used. The two most popular forms of electron microscopy are Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM). The sorts of picture...