The article starts with a general introduction to the problem in modern physics about the constancy of the speed of light for all frames of reference. In the “General Introduction”, besides presenting the used terms and definitions, the fundament of a real solution about all “unexpected” and “inexplicable” results of the experiments related to the measurement of the velocity of light in the time-spatial region “on the Earth surface” is given. The presented analysis of the experiments with “One-way measurement of the speed of light” is based on the classical mechanics and Galilean relativity, which are indisputably valid and legitimate in our local time-spatial domain “on the Earth’s surface”. The experiments undoubtedly show that in the frame of reference related to the Earth’s surface, the measured velocity of light in the “East-to-West” direction is higher, and in the direction “West-to-East” it is lower than the speed of the light in vacuum. The difference is equal to the linear velocity of the Earth’s surface at the latitude where the experiment is carried out. Despite the obvious fabricated explanation of the results of the experiments by the supporters of the special theory of relativity (using the inadmissible but convenient implausible clock synchronization convention) - the real conclusion is that these experiments are actually irrefutable proof that the measured speed of light in a local time-spatial region with a uniform intensity of the gravitational field is not the same for all inertial frames of reference. KEY WORDS: special theory of relativity; speed of light postulate; one-way measurement of the speed of light.