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: Physics units help

  1. Sep 6, 2010 #1
    1. The problem statement, all variables and given/known data

    I am told that 1 (E)1/2 = 9.045Å-1, where E is the energy in meV. How do I find out what 1 meV is in Å from that? All I can get is the correspondence between meV and Å-2, not meV and Å.
  2. jcsd
  3. Sep 6, 2010 #2


    User Avatar
    Homework Helper

    Re: Units

    What does the Å represent?
    Do the 1 and 9.045 have units?
    Maybe your job is just to solve the equation for Å, and put in 1 MeV for E. Not a clear question in my opinion - if you have posted all of it. Normally the 1 MeV would be changed into standard units of energy (Joules) but I don't know what you should do in this case.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook