Electron Microscope Free Essay, Term Paper and Book Report
The electron microscope has become one of the most widely utilized instruments for materials characterization. An electron microscope is a scientific instrument that allows us to “see” objects so small that they cannot be seen in any other way. (CITE) Electron microscopes have allowed scientists to see individual molecules and atoms for the first time. Most microscopes, including those in schools and laboratories today, are optical microscopes. They use glass lenses to enlarge, or magnify, an image. An optical microscope cannot produce an image of an object smaller than the length of the light wave in use. To see anything smaller than 2,000 angstroms (about 1/250,000 of an inch) a wave of shorter length would have to be used. In 1923, a French physicist Louis de Broglie suggested that electrons, like light, travel in a wave. In addition, the wavelength of electrons is much shorter than the wavelength of light. An electron is an elementary particle carrying a unit of charge of negative electricity. (CITE) J. J. Thompson discovered the electron in 1897......
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