The Dynamics of the Constancy of Light Speed

Just as Einstein said, "Light is always propagated in empty space with a definite velocity \(c\) which is independent of the state of motion of the emitting body", which has been experimentally verified and is widely known. However, college physics textbooks do not tell us the dynamic reason why the speed of light remains constant in the vacuum of flat cosmic space. By re-examining the electrostatic field dragged by point charges, the static gravitational field dragged by the sun, and the starlight deflection angle in stellar aberration phenomena, this paper presents that all observers inevitably drag their respective static vacuum fields. This result shows that the constancy of light speed in a vacuum and the constancy of sound speed in uniform air are consistent in the natural mechanism, thereby equipping the theoretical possibility to quantize vacuum and unify the quantum-level system and the macroscopic system