Question

The wavelength of Lyman series is.

• A. $\frac{4}{3 \times 10967}cm$
• B. $\frac{3}{4 \times 10967}cm$
• C. $\frac{4 \times 10967}{3}cm$
• D. $\frac{3}{4} \times 10967\mspace{6mu} cm$

Answer 1

Answer: (A)

$\frac{4}{3 \times 10967}cm$

Answer 2

$\frac{1}{\lambda} = R_{H}\left\lbrack \frac{1}{n_{1}^{2}} - \frac{1}{n_{2}^{2}} \right\rbrack.$ For Lyman series n₁=1 and n₂=2, 3, 4, When n₂=2, we get $\lambda = \frac{4}{3R_{H}} = \frac{4}{3 \times 10967}cm$