The wavelength of the first line of Balmer series is 6563 Å. The Rydberg constant for hydrogen is about
Answer & explanation
Correct answer: option 1
$\frac{1}{\lambda}=R\left[\frac{1}{4}-\frac{1}{9}\right]=\frac{5 R}{36}$
∴ R = $\frac{36}{5 \lambda}=\frac{36}{5 \times 6563 \times 10^{-10}}=1.09 \times 10^7 m^{-1}$