A) \[9:11\]
B) \[11:9\]
C) \[4:5\]
D) \[5:4\]
Correct Answer: A
Solution :
\[v=f\lambda \] \[{{f}_{reflected.}}=\left( \frac{10u}{10u+u} \right){{f}_{received}}\] \[\frac{{{\lambda }_{rec}}}{{{\lambda }_{ref}}}\,=\left( \frac{10u-u}{{{f}_{rec}}} \right)\,\times \frac{{{f}_{ref}}}{10u}\,=\frac{9u}{{{f}_{rec}}}\,\frac{\left( \frac{10u}{11u}\,\times {{f}_{rec}} \right)}{10u}=\frac{9}{11}\]You need to login to perform this action.
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