Atoms & Nuclei

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154 of 239

Question 154 of 239

The transition from the state n=4n=4 to n=3n=3 in a hydrogen like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition from

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Answer: (D) 5→45 \rightarrow 4

IR corresponds to least value of (1n12−1n22)\left(\frac{1}{n_1^2}-\frac{1}{n_2^2}\right)
i.e. from Paschen, Bracket and Pfund series. Thus the transition corresponds to 5→35 \rightarrow 3.

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