A) \[1cm\]
B) \[2cm\]
C) \[4.0cm\]
D) \[3.4cm\]
Correct Answer: D
Solution :
\[\frac{{{\mu }_{2}}}{v}-\frac{{{\mu }_{1}}}{u}=\frac{{{\mu }_{2}}-{{\mu }_{1}}}{R}\] \[\Rightarrow \]\[\frac{1.34}{v}-\frac{1}{-\infty }=\frac{0.34}{7.8}\] \[\Rightarrow \] \[v=\frac{1.34\times 7.8}{0.34}nm\] \[=3.074cm\]
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