試題詳解

2. What is the reason that a modern transmission electron microscope (TEM) can resolve biological images to the sub-nanometer level?
(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.