McqMate
| Q. |
What is viewed through an electron microscope? |
| A. | Electrons and other elementary particles |
| B. | Structure of bacteria and viruses |
| C. | Inside of human stomach |
| D. | Inside of the human eye |
| Answer» B. Structure of bacteria and viruses | |
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Explanation: Electron microscopes are used to observe a wide range of biological and inorganic specimens including microorganisms, cells, large molecules, biopsy samples, metals, and crystals. An electron microscope uses a beam of electrons to illuminate a specimen and produce a magnified image. An electron microscope (EM) has greater resolving power than a light- powered optical microscope because electrons have wavelengths about 100,000 times shorter than visible light photons. |
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