How are scanning electron microscope in tunneling electron microscope used?

The STM works best with conducting materials, but it is also possible to fix organic molecules on a surface and study their structures. For example, this technique has been used in the study of DNA...

scanning microscope can able to scan outer cell wall, membrane etc...... transmission microscope can help to study the interior structure of microbes.

Magnetic lenses are used to control the electron beam in an electron microscope. The magnetic field produced by the magnetic lenses deflects the energetic electrons. They are typically called...

electron Microscopes are scientific instruments that use a beam of highly energetic electrons to examine objects on a very fine scale. This examination can yield the following...

Samples are examined in a vacuum, so you can't examine either live subjects or vital processes. They also cost as much as a few hundred light scopes.