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: Quantum Well

  1. May 24, 2010 #1
    1. The problem statement, all variables and given/known data
    Calculate the first three energy leveles for an electron in a quantum well of width 10Angstrom
    and infinite walls.


    2. Relevant equations

    [tex]En=\frac{n2pi2(hbar)2}{2mL2}[/tex]

    3. The attempt at a solution
    m=9.109E-31Kg
    L=10E-10m
    hbar=1.055E-34
    En=n2*6.032E-20

    My problem is really with the unit though.

    here is what I have

    [tex]\frac{Kgm2}{s}*\frac{Kgm2}{s}*\frac{1}{Kg}*\frac{1}{m2}=[/tex][tex]\frac{Kgm2}{s2}[/tex]
     
  2. jcsd
  3. May 24, 2010 #2

    vela

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Education Advisor

    In TeX, you don't use the sup tags. To get a superscript, use ^, e.g. n^2 for n2.

    What's the specific problem you have with the units? A kg m2/s2 is a Joule.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook