A meson has a speed 0.6c with respect to ground and its time of flight with respect to in the rest frame is \(2\times {{10}^{-8}}s\) then the time of flight observed with respect to itself is.
1
\(3\times {{10}^{-8}}s\)
2
\(2.5\times {{10}^{-8}}s\)
3
\(6\times {{10}^{-8}}s\)
4
none