An electron and a photon each have a wave length of $1.00\;nm$ calculate the energy of the photon. $h= 6.6 \times 10^{-34}\;Js,m_e= 9 \times 10^{-31}\;kg$

Question

$\begin{array}{1 1} 124.3\;ev \\ 12.43\;ev \\ 1.243\;ev \\ 1243\;ev \end{array}$