A dissection microscope is light illuminated. The image that appears to its user is three-dimensional. It is used for dissection. One cannot see individual cells because in a dissection microscope because it has a relatively low magnification.
A Scanning Electron Microscope uses a beam of highly energetic electrons to examine objects on a very fine scale. Richard Schalek and Lawrence Drzal explain in Advanced Materials & Processes that electron microscopes function exactly as their optical counterparts except that they use a focused beam of electrons instead of light to "image" the specimen and gain information as to its structure and composition. This beam is focused onto the sample using a magnetic lens. The interaction between the electron beam and the target is detected and transformed into an image. The image is seen in three dimensions. Electron microscopes have high magnification and high resolution. Electron microscopes were developed due to the limitations of light microscopes that are limited by the physics of light to 500x or 1000x magnification (Schalek & Drzal, 1997, 21).