If a Modern Electron Microscope (TEM)can Resolve Biological Images to the Nanometer

question 33

Multiple Choice

If a modern electron microscope (TEM) can resolve biological images to the nanometer level, as opposed to the best light microscope, this is due to which of the following?

• 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 much greater ratio of image size to real size.
• E)The electron microscope cannot image whole cells at one time.

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