How do scanning electron microscopes function?

However, the electron microscope can resolve features that are more than 1 million times smaller. Electron Microscopes (EMs) function like their optical counterparts except that they use a focused beam of electrons instead of photons to "image" the specimen and gain information as to its structure and composition. read more

Mainly both the scanning electron microscope and the light or optic microscope functions by bouncing tiny particles or waves off of matters in order to make them visible. However, electrons are smaller than light photons so we can see smaller objects clearly with the electron microscopes. read more

Very briefly ans simplified: Electrons created by the source (FEG) are accelerated up to 30 kV. The beam gets it’s shape in the Condenser lenses and projected towards the sample through the Objective lens. read more