A) \[\sqrt{n}\]
B) \[\frac{1}{\sqrt{n}}\]
C) \[{{n}^{2}}\]
D) \[\frac{1}{n}\]
Correct Answer: A
Solution :
\[{{r}_{n}}=\sqrt{nd\lambda }\,\,\Rightarrow {{r}_{n}}\propto \sqrt{n}\]
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