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Scanning Electron Microscope
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Summary
Ordinary light microscopes have a limit. At the microscopic level, light waves are bigger than some of the things that people would like to look at. The electron microscope uses a stream of electrons to replace the light beam. There are two main types of electron microscopes. A transmission electron microscope is similar to a light microscope, but it uses an electron beam where the light bulb should be, and a fluorescent screen for viewing the result. The scanning electron microscope allows the viewer to see a specimen more easily, but is equally more complex to use.
World's most powerful microscope: http://www.youtube.com/watch?v=sCYX_XQgnSA
Keywords: Acme School of Stuff, electron microscope, David Stringer, scanning electron microscope, transmission electron microscope