# Quantum Well

1. May 24, 2010

### ryukyu

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

$$En=\frac{n2pi2(hbar)2}{2mL2}$$

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

$$\frac{Kgm2}{s}*\frac{Kgm2}{s}*\frac{1}{Kg}*\frac{1}{m2}=$$$$\frac{Kgm2}{s2}$$

2. May 24, 2010

### vela

Staff Emeritus
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.