Measuring the One-Way Speed of Light


This site references a paper I have written containing insights into how you would go about measuring the one-way speed of light.

The paper use thought experiments and limited mathematics to review how relativity works, and discloses a method and apparatus for accurately measuring the one-way speed of light.

The paper also discloses how you can use the results obtained to:

  • Prove that the one-way speed of light is not a constant.
  • That the one-way speed of light varies depending on the direction light is travelling relative to the direction of travel of the moving frame of reference.
  • Determine the absolute vector direction and velocity of an object moving through spacetime independent of an external frame of reference.
  • Determine absolute dead-stop in spacetime.
  • Properly synchronize two independent clocks.
  • Explain under what conditions a neutrino can go faster than the speed of light.


A version of this paper has been peer reviewed and published by:

Applied Physics Research
Canadian Center of Science and Education (CCSE)
Vol. 10, No. 6; November 9, 2018
ISSN 1916-9639 E-ISSN 1916-9647
Link to Publication Index
Link to Article Summary
Link to Published Article

I am currently looking for feedback from Experimental Physicists who have an interest or knowledge regarding measuring the one-way speed of light.


Document Links:

Measuring the One-Way Speed of Light
Lorentz Transform Example
Companion Excel WorkSheet


Ken Davies
contact: ken@imgmaker.com

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