Question

The wavelength of first line of Balmer series is 6563Å. The wavelength of first line of Lyman series will be –

• A. 1215.4Å
• B. 2500Å
• C. 7500Å
• D. 600Å

Answer 1

Answer: (A)

1215.4Å

Answer 2

$\frac{1}{\lambda}$ = Rz² $\left( \frac{1}{n_{1}^{2}} - \frac{1}{n_{2}^{2}} \right)$

First line of Balmer ® (3 ® 2)

First line of Lyman ® (2 ® 1)