The book im using did a simple little algebra and it is showing the quantized energy levels of an electron in a one-dimensional atom of width 0.1nm.(adsbygoogle = window.adsbygoogle || []).push({});

They did this:

[tex]

\begin{array}{l}

E_n = n^2 \frac{{h^2 }}{{8ml^2 }} \\

E_n = n^2 \frac{{h^2 c^2 }}{{8mc^2 l^2 }} \\

E_n = n^2 \frac{{(1239.8eV*nm)^2 }}{{(8)(0.511*10^6 eV)(0.1nm)^2 }} \\

\end{array}[/tex]

But where did the c^2 go on top?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Confused on how they derived this

**Physics Forums | Science Articles, Homework Help, Discussion**