What is sEM? A type of electron microscope t that produces images of a sample by scanning it with a focused electron beam. The electrons interact with atoms in the sample, producing various signals that can be detected and that contain information about the sample's surface topography and composition. It is the most widely used type of electron microscope. 15What is SEM? • A type of electron microscope that produces images of a sample by scanning it with a focused electron beam. • The electrons interact with atoms in the sample, producing various signals that can be detected and that contain information about the sample’s surface topography and composition. • It is the most widely used type of electron microscope. 15