- #1
jahrudz
- 2
- 0
I understand that c is the "ultimate speed" and that it is a result of the fundamental constant, the permeability of free space. But if this is a constant only to a "stationary" frame of reference, how can we accurately measure it from Earth? Since Earth is moving relative to a supposed "fixed" point in the Universe, shouldn't our measurement of the speed of light be off somehow? And is the difference between this measurement and the derived speed of light related to the relative speed of the Earth?