In the Balmer series of hydrogen atomic spectrum there is spectral line having wave length 434.4 \mathrm{nm} .434.4nm. Calculate the number of higher orbit from which the electron drops to generate this line \left[\mathrm{R}=10.97 \times 10^{6} \mathrm{m}^{-1}\right][R=10.97×106m−1]
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