A) \[4\times {{10}^{6}}Hz\]
B) \[3.3\times {{10}^{7}}Hz\]
C) \[3\times {{10}^{6}}Hz\]
D) \[5\times {{10}^{7}}Hz\]
Correct Answer: B
Solution :
\[n'=n\left( \frac{c}{c+{{c}_{s}}} \right)\] \[=4\times {{10}^{7}}\times \left( \frac{c}{c+0.2c} \right)\] \[=3.3\times {{10}^{7}}Hz\]
You need to login to perform this action.
You will be redirected in
3 sec
