• A_A@lemmy.world
    link
    fedilink
    arrow-up
    1
    ·
    2 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
      link
      fedilink
      arrow-up
      2
      ·
      2 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
        link
        fedilink
        arrow-up
        3
        ·
        2 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.