A) \[7200\overset{\text{o}}{\mathop{\text{A}}}\,\]
B) \[4800\overset{\text{o}}{\mathop{\text{A}}}\,\]
C) \[1080\overset{\text{o}}{\mathop{\text{A}}}\,\]
D) \[3600\overset{\text{o}}{\mathop{\text{A}}}\,\]
Correct Answer: B
Solution :
\[\frac{{{\mu }_{m}}}{{{\mu }_{a}}}=\frac{{{\lambda }_{c}}}{{{\lambda }_{m}}};\] \[\frac{3}{2}=\frac{7200{{A}^{o}}}{{{\lambda }_{m}}};\] \[{{\lambda }_{m}}=2\times 2400{{A}^{o}}=4800{{A}^{o}}\]
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