Question

You're a cell biologist who wants to image microtubules that form the "skeletons" of living cells. The microtubules are $25 \mathrm{~nm}$ 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 $40 \mathrm{keV}$, or a more expensive unit that produces 100-keV electrons. Will the less expensive microscope work?

Name: Problem 68, Chapter 24: Essential University Physics Global Edition
Uploaded: 2023-04-03T22:13:18-08:00
Channel: James Kiss

   You're a cell biologist who wants to image microtubules that form the "skeletons" of living cells. The microtubules are $25 \mathrm{~nm}$ 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 $40 \mathrm{keV}$, or a more expensive unit that produces 100-keV electrons. Will the less expensive microscope work?

Essential University Physics Global Edition

Richard Wolfson 4th Edition

Chapter 24, Problem 68

Instant Answer

Solved by Expert James Kiss

04/03/2023

Step 1

In this case, the diameter of the microtubules is given as $25 \mathrm{~nm}$. So, we can write this as $\lambda = D$. Show more…

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You're a cell biologist who wants to image microtubules that form the "skeletons" of living cells. The microtubules are $25 \mathrm{~nm}$ 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 $40 \mathrm{keV}$, or a more expensive unit that produces 100-keV electrons. Will the less expensive microscope work?