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froggtongue · M
The one way directional speed is. But it all balances out for the round trip.
@froggtongue The isotropic one way speed of light was never attempted
@froggtongue Some physicists do not seem to be aware of that only the round-trip speed of light has been very well-tested. The round-trip speed of light is indeed isotropic and is represented by the constant c. To measure the round-trip speed of light, we only need one clock and because of this we are not dependent on any clock synchronization procedures. In general, this is not the case when setting up experiments for measuring the one-way speed of light.