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In an electron microscope, the electrons are accelerated at voltages up to 400 kV. A.) To what velocity is an electron accelerated while moving

In an electron microscope, the electrons are accelerated at voltages up to 400 kV.
A.) To what velocity is an electron accelerated while moving through this potential?
B.) What is the wavelength of an electron with this velocity?
C.) The resolution of an electron microscope is given approximately by: resolving power = 0.56 ? (wavelength)3/4 .
Would you expect to resolve a collagen triple helix, which has a width of 1.5 nm, embedded in a negative contrast stain?

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