Energy of an electron is given by $E= -2.178 \times 10^{18} J \bigg(\large\frac{Z^2}{n^2}\bigg)$. Wavelength of light required to excite an electron in an hydrogen atom from level $n = 1$ to $n = 2$ will be

Question

$\begin{array}{1 1} (1) 1.214 \times 10^{-7}\;m \\ (2) 2.816 \times 10^{-7}\;m \\ (3) 6.500 \times 10^{-7}\;m \\(4) 8.500 \times 10^{-7}\;m \end {array}$