July 30, 2025Open Access

Limited Validity of the Second Postulate of the STR

Key Points

MAIN FINDING: Light behaves consistently in a still medium but varies in a dynamic medium based on measurement position.
KEY EVIDENCE: Marmet's 2000 measurement shows light takes 14 μs longer traveling from S.F to N.Y. compared to the reverse.
APPROACH: The research analyzes experimental data to address the validity of the second postulate of STR.
SIGNIFICANCE: The findings challenge conventional physics notions about light and suggest limitations of the STR in certain mediums.

Abstract

The velocity of light is one of the most fundamental questions in physics. For centuries, the velocity of light has been a subject of scientific discussion. In this article, we will discuss this subject based on the experimental data. Marmet measured in 2000 that light needs 14 μs more when traveling in the direction S.F to N.Y., when traveling back in the opposite direction. These data are the main tools of this research. The result of the research is that light has a constant velocity in a still medium. In the dynamic medium velocity of light increases or decreases depending on the position of the apparatus that measures its velocity. The second postulate of STR is valid only in a stationary ether.

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Cite This Study

Amrit Šorli (Fri,) studied this question.

synapsesocial.com/papers/689a0945e6551bb0af8cf08b https://doi.org/https://doi.org/10.20944/preprints202507.2115.v1