A) \[2\times {{10}^{-4}}s\]
B) \[2\times {{10}^{4}}s\]
C) \[2\times {{10}^{-11}}s\]
D) \[2\times {{10}^{11}}s\]
E) \[2\times {{10}^{8}}s\]
Correct Answer: C
Solution :
Time taken \[=\frac{\mu t}{c}\] \[=\frac{\frac{3}{2}\times 4\times {{10}^{-3}}}{3\times {{10}^{8}}}\] \[=2\times {{10}^{-11}}s\]
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