Question

The ratio of minimum wavelengths of Lyman and Balmer series will be

• A. 1.25
• B. 0.25
• C. 5
• D. 10

Answer 1

Answer: (B)

0.25

Answer 2

For minimum wavelength,
$\lambda \propto n^{2}$
$\therefore \frac{\lambda_{\text {Lyman }}}{\lambda_{\text {Balmer }}}=\left(\frac{1}{2}\right)^{2}$
$\frac{\lambda_{L}}{\lambda_{B}}=\frac{1}{4}=0.25$