Even though electrons are seen to behave like wave, still, how would something “see” the electrons?
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When light strikes a detector in a camera, it trips something in that detector, for instance it moves an electron. This moved electron creates an electronic signal which we use to recreate the image.
There are many ways to detect electrons. One option it actually to ‘cheat’ and use the electron to create light. Then you detect it with a very sensitive light sensor.
Electron microscopes tend to be a little bit different than your standard camera, as lensing electrons to project an image can become impractical. Instead, they take other approaches. A scanning electron microscope, for instance, fires a beam of electrons and generates the image “one pixel at a time” as the beam slowly crawls across the subject.
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