One-way speed of light
Videos
When using the term "the speed of light" it is sometimes necessary to make the distinction between its one-way speed and its two-way speed. The "one-way" speed of light, from a source to a detector, c
List of eclipses of the Jupiter moon Io that formed the basis of Ole Rømer's discovery of the finite speed of light.
Artist's illustration of a bright gamma-ray burst. Measurements on light from such objects were used to show that the one-way speed of light does not vary with frequency.
Hendrik Antoon Lorentz
Lorentz ether theory
Videos
What is now often called Lorentz ether theory has its roots in Hendrik Lorentz's "theory of electrons", which marked the end of the development of the classical aether theories at the end of the 19th
Hendrik Lorentz
Henri Poincaré
Albert Einstein