Measurements in two frames, S and S’, are related by the usual Lorentz transformation, with = 0.6 β=0.6. At ′ = 1 0 − 7 t ′ =10 ⁻⁷ sec, a particle leaves the point x ′ = 10 x ′ =10 m, traveling in the x ′ x ′ direction.