The shortest wavelengths emitted in hydrogen spectrum corresponding to different spectral series are under:
(A) Pfund series
(B) Balmer series
(C) Brackett series
(D) Lyman series
The wavelengths arranged correctly in decreasing order are _____________
Fill in the blank with the correct answer from the options given below.

Correct option is B

Electron transition in hydrogen atom is given below,

Every atom contains a set of energy levels/states that may be represented and explained using Bohr's atomic model. He assigns quantum numbers to energy levels (n = 1,2,3,4,5,6…). When electrons go from higher energy levels (n_h) to lower energy ones (n₁), they produce a photon with energy (n_h – n₁). Because the energy related to each state is set, the difference between the energy states is likewise fixed. Hence, the transition between identical energy levels produces the same energy photon.
The decreasing order of wavelengths of these series is given as, Pfund series, Brackett series, Paschen series, Balmer series, Lyman series.