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JEE Main 2009
Exam
JEE Main
Year
2009
Subject
Physics
Chapter
Atomic Physics

JEE Main 2009 · Physics · Atomic Physics

The transition from the state n=4 to n=3 in a hydrogen like atom...

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

Options

  1. A2→12 \rightarrow 1
  2. B3→23 \rightarrow 2
  3. C4→24 \rightarrow 2
  4. D5→45 \rightarrow 4

Correct answer

D. 5→45 \rightarrow 4

Step-by-step solution

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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