What is the reason that a modern electron microscope (TEM) can resolve biological images to the subnanometer level, as opposed to tens of nanometers achievable for the best super-resolution light microscope?
A) The focal length of the electron microscope is significantly longer.
B) Contrast is enhanced by staining with atoms of heavy metal.
C) Electron beams have much shorter wavelengths than visible light.
D) The electron microscope has a much greater ratio of image size to real size.
E) The electron microscope cannot image whole cells at one time.
Modern Corn Was Domesticated from the Wild Grass Teosinte
Electron Microscope Images of a Diatom
The Oase I mandible, earliest modern human in Europe.
Cyclic electron flow
A transmission electron micrograph of cytokinesis in a cross section of a dividing cell
Electron micrograph of the bacterium Escherichia coli