A) \[R\]
B) \[3R\]
C) \[\frac{5R}{36}\]
D) \[\frac{8R}{9}\]
Correct Answer: C
Solution :
Wave number \[v=\frac{1}{\lambda }=R\left( \frac{1}{n_{1}^{2}}-\frac{1}{n_{2}^{2}} \right)\] Here, \[{{n}_{1}}=2\], \[{{n}_{2}}=3\] \[\therefore \] \[\overline{v}=\frac{5R}{36}\]
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