Youre a cell biologist who wants to image microtubules that form the skeletons of living

Chapter 34, Problem 64

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Youre a cell biologist who wants to image microtubules that form the skeletons of living cells. The microtubules are 25 nm n 5 2 n 5 1 n 5 225 9.32-_eV n1 S `. n 5 180 n 5 179 90. 135 4.23105 90 1.831015 Hz. in diameter, and, as Chapter 32 shows, you need to image with waves whose wavelength is at least this small. You can use either an inexpensive electron microscope that accelerates electrons to kinetic energies of 40 keV, or a more expensive unit that produces 100-keV electrons. Will the less expensive microscope work? 6

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