The spectral series which corresponds to the electronic transition from the levels n₂=5,6,…to the level n₁=4 is

The spectral series which corresponds to the electronic transition from the levels $n_2=5,6,\ldots$ to the level $n_1=4$ is
A Pfund series
B Brackett series
C Lyman series
D Balmer series

Detailed Solution

Transitions ending at $n_1=4$ correspond to the Brackett series (Pfund is $n_1=5$, Lyman is $n_1=1$, Balmer is $n_1=2$).

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