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A scanning electron microscope will scan the surface and an electron microscope looks inside.

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16y ago

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Explain how electron microscopy and scanning tunneling microscopes have contributed to the understanding of atoms?

Electron microscopy uses a focused beam of electrons to create detailed images of atomic structures, allowing scientists to see atoms and their arrangement in materials. Scanning tunneling microscopes use a fine tip to measure the electrons flowing between the tip and the surface of a material, providing atomic-scale resolution and enabling scientists to manipulate atoms. Both techniques have revolutionized our understanding of atoms by allowing direct observation and manipulation at the atomic level.


What type of microbe are best seen through an electron microscope explain why?

Viruses are best seen through an electron microscope because of their extremely small size. Electron microscopes use a beam of electrons to magnify objects, allowing for resolution of structures as small as a few nanometers, which is necessary to visualize viruses. Light microscopes are not powerful enough to visualize structures at this level of detail.


Explain how to prepare a specimen for viewing in a electron microscope?

For a scanning electron microscope, the most commonly used type of EM, there is no need to do anything other than stick it to an electrically conducting pad. If the sample is particularly insulating, it may be worth coating it with a very thin gold layer to prevent the specimen from charging up with electrons from the beam (this would blur the image) For a transmission electron microscope, the specimen is most commonly encased in epoxy resin before being sliced into thin enough slices that the electron beam can pass through. The sample is then placed on a fine copper grid before being placed in the microscope.


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