1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Finding diffraction-limited spatial resolution

  1. Oct 6, 2013 #1
    1. The problem statement, all variables and given/known data

    A scanning electron microscope (SEM) images samples using a beam of electrons. If
    the electrons are accelerated across a potential difference of 5.00 kV, what is the
    diffraction-limited spatial resolution of the SEM? Work this problem both relativistically and nonrelativistically.

    2. Relevant equations
    This is what I used, but I'm not sure what exactly to use.

    3. The attempt at a solution
    I first solved for E using E=eV, because I have both e and V, then I plugged that into the second equation to solve for wavelength (don't know why, I just wasn't sure what I'm supposed to be solving for. I understand what the question wants from me).

    Then I set [itex]eV=\frac{mv^{2}}{2}[/itex], solving for velocity and found it to be 4.19x107.

    Then I solved for E using [itex]E=γmc^{2}[/itex]

    But I'm not sure what the question wants me to find. What is diffraction-limited spatial resolution?

  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted