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.

[–] sukhmel@programming.dev 2 points 6 months ago (1 children)

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 3 points 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.