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?

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# Homework Help: Confused on how they derived this

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