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Old 03-21-2017, 10:41 PM   #7
shakthipriya
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Join Date: Feb 2017
Posts: 115
A scanning electron microscope (SEM) is a type of electron microscope that produces images of a sample by scanning it with a focused beam of electrons. The electrons interact with atoms in the sample, producing various signals that contain information about the sample's surface topography and composition.
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