A) \[{{10}^{10}}{{m}^{-1}}\]
B) \[{{10}^{7}}{{m}^{-1}}\]
C) \[{{10}^{4}}{{m}^{-1}}\]
D) \[{{10}^{-7}}{{m}^{-1}}\]
Correct Answer: B
Solution :
\[E=-Rch\]Þ \[R=-\frac{E}{ch}=-\frac{13.6\times 1.6\times {{10}^{-19}}}{3\times {{10}^{8}}\times 6.6\times {{10}^{-34}}}\] \[=1.098\times {{10}^{7}}\,per\,m\]
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