A monochromatic light is incident on a hydrogen sample in ground state. Hydrogen atoms absorb a fraction of light and subsequently emit radiation of…

A monochromatic light is incident on a hydrogen sample in ground state. Hydrogen atoms absorb a fraction of light and subsequently emit radiation of six different wavelengths. The frequency of incident light is $\displaystyle x \times 10^{15} \mathrm{~Hz}$. The value of $\displaystyle x$ is $\displaystyle \_\_\_\_$. (Given $\displaystyle \mathrm{h}=4.25 \times 10^{-15} \mathrm{eVs}$ )