Atomic Spectra

Step 1: Relationship between series.
The Lyman series corresponds to transitions to the first energy level (n = 1), while the Paschen series corresponds to transitions to the third energy level (n = 3). The wavelength of the spectral lines is related to the energy difference between levels by the Rydberg formula: where is the Rydberg constant.
Step 2: Finding the ratio of wavelengths.
Given that the minimum wavelength in the Lyman series corresponds to the transition from n = 2 to n = 1, the wavelength in the Paschen series for the transition from n = 4 to n = 3 will be:
Thus: Thus, the correct answer is
(B) 7300 Å.