Research on Lorentz “Local Time”

The meaning of Lorentz “local time” is reconsidered in the classical physics. Set up two inertial reference frames S and S', the frame S' is moving at a velocity v relative to frame S in the x direction. When the origin of frame S' passes the origin of frame S, the clocks at the two frames all read zero. In the zero instant in the frame S, a motionless light source emits light signals. One light signal reaches the origin of frame S at time t, and another light signal reaches the origin of frame S' at time t', then t' is Lorentz “local time”. The research indicates that the constant of c derived by using Lorentz “local time”, in fact, is the velocity of light propagating in the ether medium.