• lad@programming.dev
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    6 months ago

    Not sure what are those “both” ways, but yeah isotropic or especially anisotropic speed of light would be nice to know for sure

    • A_A@lemmy.world
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      6 months ago

      The speed of light being isotropic has been demonstrated already and I believe I know what they mean when they say “both ways” : since all demonstrations of the speed of light are based on “round way trip” from A to B then from B to A. But, no experiments can measure a one-way trip speed.

      • lad@programming.dev
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        6 months ago

        Then I was probably incorrect, what would be a correct term for isotropic but depends on direction? Because I also meant one-way speed

        • A_A@lemmy.world
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          6 months ago

          Hi lad,
          i was not certain so i double checked :
          https://en.m.wikipedia.org/wiki/Isotropy
          Physics - - Electromagnetics :

          An isotropic medium is one such that the permittivity, ε, and permeability, μ, of the medium are uniform in all directions of the medium, the simplest instance being free space.

          … if you read this like i do, they do not care to diferentiate “round trip” and “one way” … and my vocabulary is not good enough to find a word that would fit.