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

( A ) $8.500 \times 10^{-7}$ m
( B ) $2.816 \times 10^{-7}$ m
( C ) $1.214 \times 10^{-7}$ m
( D ) $6.500 \times 10^{-7}$ m