The Expectation Value of \bgroup\color{black}$r$\egroup in the Ground State


\begin{displaymath}\bgroup\color{black}\langle \psi_{100}\vert r\vert\psi_{100}\...
...0}\; dr= 3!{1\over 4}{a_0\over Z}={3\over 2}{a_0\over Z}\egroup\end{displaymath}



Jim Branson 2013-04-22