Atoms And Nuclei

A hydrogen atom changes its state from \(n=3\) to \(n=2\). Due to recoil, the percentage change in the wave length of emitted light is approximately \(1 \times 10^{-n}\). The value of \(n\) is _______.

[Given Rhc \(=13.6 \mathrm{~eV}, \mathrm{hc}=1242 \mathrm{~eV} \mathrm{~nm}, \mathrm{h}=6.6 \times 10^{-34} \mathrm{~J} \mathrm{~s}\) mass of the hydrogenatom \(=1.6 \times 10^{-27} \mathrm{~kg}\)]