Question

RATIO of longest wavelengths corresponding to Lyman and Balmer series in hydrogen spectrum is:

Answer 1

Answer:

$3) \: \: \frac{5}{27}$

Explanation:

Hope it is helpful....

Answer 2

Answer:

$5/27$

Explanation:

wavelengths for Lyman series

$\lambda=\frac{1}{R(1-\frac{1}{4} })=\frac{4}{3R}$

wavelengths for Balmer series

$\lambda_B=\frac{1}{R(\frac{1}{4}-\frac{1}{9}) } =\frac{1}{R(\frac{5}{36}) } =\frac{36}{5R}$

$\frac{ \lambda_L}{ \lambda_B} =\frac{4}{3R} \times\frac{5R}{36} =5/27$

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