Electron Microscope (Scanning Tunneling Electron Microscope (Can be used…
Scanning Tunneling Electron Microscope
Can be used to observe cell division
This instrument has enabled scientists to create three-dimensional computer images of objects as small as atoms.
Can be used with live specimens.
Involves bringing the charged tip of a probe extremely close to the specimen so that the electrons “tunnel” through the small gap between the specimen and the tip.
Transmission Electron microscope
Transmitted to specimen and display the image to a fluorescent screen
Magnifies up to 500,00x
For nonliving specimen
Thin specimen --> less electrons
Thick specimen --> more electrons
Scanning electron microscope
for nonliving specimen
Directs electrons over the surface of the specimen producing three-dimensional image
Atomic Force Microscope
Measures various forces between the tip of a probe and the cell surface.