Calculate the wavelength and energy of radiation emitted for the electronic transition from infinity to stationary state on of the hydrogen atom .

Question

$\begin{array}{1 1} (a)\;2.186 \times 10^{-18}\;J \\ (b)\;3.186 \times 10^{-18}\;J \\ (c)\;5.186 \times 10^{-18}\;J\\(d)\;1.186 \times 10^{-18}\;J \end{array}$