A) \[4\times {{10}^{-11}}s\]
B) \[2\times {{10}^{-11}}s\]
C) \[16\times {{10}^{-11}}s\]
D) \[8\times {{10}^{-30}}s\]
Correct Answer: A
Solution :
Time taken\[\text{=}\frac{\text{Distance}}{\text{Speed}}\] \[=\frac{d}{{{v}^{2}}}=\frac{d}{c/\mu }\] \[=\frac{4\times {{10}^{-3}}\times 3}{3\times {{10}^{8}}}\] \[=4\times {{10}^{-11}}s\]
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