A) \[1.6\overset{o}{\mathop{A}}\,\]
B) \[0.16\overset{o}{\mathop{A}}\,\]
C) \[0.5\overset{o}{\mathop{A}}\,\]
D) \[2.0\overset{o}{\mathop{A}}\,\]
Correct Answer: B
Solution :
As \[\frac{1}{n}=R{{(Z-1)}^{2}}\left( \frac{1}{n_{2}^{2}}-\frac{1}{n_{1}^{2}} \right)\] For \[{{K}_{a}}\] line \[{{n}_{2}}={{l}_{1}}\,{{n}_{1}}=2\] \[\Rightarrow \] \[n=0.16\,A\]
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