What is electrons..mm and their type also explain please
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An electron is a negatively charged subatomic particle. It can be either free (not attached to any atom), or bound to the nucleus of an atom. Electrons in atoms exist in spherical shells of various radii, representing energy levels. ... The charge on a single electron is considered as the unit electrical charge.
Types of electrons:-In the case of a scanning electron microscope (SEM), two types of electrons are typically detected: backscattered electrons (BSEs) and secondary electrons (SEs). BSEs are reflected back after elastic interactions between the beam and the sample.
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