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MHT CET 2025 (23 Apr, Shift 2) · Transitions, Photon Emission & Excitation

Transitions, Photon Emission & Excitation question from MHT CET 2025 (23 Apr, Shift 2)

Q14MHT CET 2025 · 23 APR · SHIFT 2Medium

Transitions, Photon Emission & Excitation

In hydrogen atom, transition from the state $n = 6$ to $n = 1$ results in ultraviolet radiation. Infrared radiation will be obtained in the transition

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Answer: (d)

Infrared lines in hydrogen belong to Paschen ( $n_f=3$ ) and higher series.
(a) is Lyman (UV); (b), (c) are Balmer (visible); (d) $5\to3$ is Paschen (IR).
So the answer is (d) $n=5$ to $n=3$ .

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