Question

The ratio of the largest to shortest wavelengths in Lyman series of hydrogen spectra is.

• A. $\frac{25}{9}$
• B. $\frac{17}{6}$
• C. $\frac{9}{5}$
• D. $\frac{4}{3}$

Answer 1

Answer: (D)

$\frac{4}{3}$

Answer 2

For Lyman series

$\frac{1}{\lambda_{\max}\left\lbrack \frac{1}{1^{2}} - \frac{1}{2^{2}} \right\rbrack\frac{3}{4}}$ and

$\frac{1}{\lambda_{\min}\left\lbrack \frac{1}{1^{2}} - \frac{1}{\infty^{2}} \right\rbrack\frac{R}{1}\frac{\lambda_{\max}}{\lambda_{\min} = \frac{4}{3}}}$.