How You Can See a Sample

Electron microscopes use something similar to a light bulb to produce electrons. This is called the filament. The filament is a piece of wire and when electricity goes through it, not only is light given off, but also electrons. These electrons are focused by a series of magnets. The magnets are made magnetic by electricity and are called electromagnets. The electrons can be focused on the sample and when they hit the sample a signal is given off. A special type of detector acts like a tv camera and the image of the sample is displayed on a tv screen. By changing how the electrons are bent and how the beam of electrons strikes the sample, you can change the magnification and focus of the tv image.



Now that you know how it works, you can look at some uses for the electron microscope.

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