An electron microscope uses electrons instead of light to form images. There are two general types of electron microscopes. A scanning electron microscope (SEM) forms an image of the surface of an object by reflecting electrons from it. (a) If the electron energy is 100 keV, what is the wavelength? (b) Based on our discussion of light microscopes in Chapter 26, what resolution do you expect to achieve with this SEM? That is, what is the approximate size of the smallest object that you expect to resolve?
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