✔ 最佳答案
Let v1, v2 be the velocities of the jets relative to the ground, and c be the speed of light. A moving clock runs slower than a stationary one. And they are related by time dilation formula
T = t / Sqrt(1 - v^2/c^2)
1.
When observed on the ground,
let t be a time interval of the ground clock, T1 and T2 be the time intervals of the jets.
T1 = t / Sqrt( 1 - v1^2/c^2 )
T2 = t / Sqrt( 1 - v2^2/c^2 )
2.
When observed in one of the jets, say the 1st one,
velocity of the ground = v1
velocity of the 2nd jet = u = (v1 + v2) / (1 + v1v2/c^2)
Let t1 be the time interval observed in jet 1. Let T and T2 be time intervals on the clocks on the ground and jet 2.
T = t1 / Sqrt( 1 - v1^2/c^2 )
T2 = t1 / Sqrt( 1 - u^2/c^2 )