Mechanics / Electrodynamics
January 21, 2021
kinematic of balls with mass, massless balls, and photons; elastic collision wall-ball; emission, propagation, and reflection of light; the velocity of light; Michelson–Morley experiment; observation of stars
The velocity of balls with mass depends on the velocity of their source. The kinematics of balls with mass is the same in the inertial and fixed frames. Practical examples indicate that the kinematics of massless balls is the same in the inertial and fixed frames like that of balls with mass. Comparing photons or wavefronts of light to massless balls, it was concluded that the kinematics of the light is the same in the inertial and fixed frames like that of massless balls and balls with mass. Experiments aimed to prove the motion of Earth and the observation of stars have to be and are consistent with the result of this study that the velocity of light depends on the velocity of its source.