Atoms - Result Question 20

21. The transition from the state $n=3$ to $n=1$ in a hydrogen like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition from :

[2012M]

(a) $2 \to 1$

(b) $3 \to 2$

(c) $4 \to 2$

(d) $4 \to 3$

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Answer:

Correct Answer: 21. (d)

Solution:

  1. (d) $\because$ The frequency of the transition $v \propto \frac{1}{n^{2}}$, when $n=1,2,3$.


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