Question

In hydrogen spectrum, if the longest wavelength of the spectral line in Balmer series is \(\lambda\), then the shortest wavelength of the spectral line in Paschen series is

• A. \(5\lambda\)
• B. \(3.75\lambda\)
• C. \(2.5\lambda\)
• D. \(1.25\lambda\)

Hint:

For hydrogen spectrum, \[ \boxed{ \frac1\lambda = R\left(\frac1{n_1^2}-\frac1{n_2^2}\right) } \] Longest wavelength corresponds to the smallest energy transition, while shortest wavelength corresponds to the series limit.

Answer 1

The Correct Option is D