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Q. The ratio of highest possible wavelength to lowest possible wavelength of Lyman series is

Structure of Atom

Solution:

$\frac{1}{\lambda_{1}}=R\left[\frac{1}{1}-\frac{1}{\infty}\right]=R$

$\frac{1}{\lambda_{2}}=R\left[\frac{1}{1}-\frac{1}{4}\right]=\frac{3 R}{4}$

$\frac{\lambda_{1}}{\lambda_{2}}=\frac{4}{3}$