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 longerb. contrast is enhanced by staining with atoms of heavy metalc. electron beams have much shorter wavelengths than visible lightd. the electron microscope has a much greater ratio of image size to real size

C. Electron beams have much shorter wavelengths than visible light

Explanation:

A beam of electrons is used to illuminate and create magnified images of specimens in an electron microscope. The resolution of a microscope increases with a decrease in the wavelength of the light it uses for illumination. The wavelength of electrons used in the electron microscope is about 100,000 times shorter than that of visible light. Therefore electron microscopes have a resolution thousand times better than the light microscope.

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