The Balmer series for the H-atom can be observed:
(a) if we measure the frequencies of light emitted when an e

Question

The Balmer series for the H-atom can be observed:
(a) if we measure the frequencies of light emitted when an excited atom falls to the ground state
(b) if we measure the frequencies of light emitted due to transitions between excited states and the first excited state
(c) in any transition in a H-atom
(d) as a sequence of frequencies with the higher frequencies getting closely packed

Accepted Answer

According to the Bohr model, the **Balmer series** corresponds to electronic transitions from higher energy levels ($n_2 > 2$) to the first excited state ($n_1 = 2$). Transitions to the ground state ($n_1 = 1$) constitute the Lyman series . Furthermore, as the principal quantum number $n$ increases, the energy levels become closer together, causing the spectral lines (frequencies) to become closely packed near the series limit . Therefore, statements (b) and (d) are correct.

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