Common sense would seem to tell us that if we were to travel very rapidly in some direction, then the speed of light in that direction ought to appear to us to be reduced to below c (because we are moving towards ‘catching the light up’ in that direction) and the apparent speed of light in the opposite direction ought to be correspondingly increased to above c (because we are moving away from the light) – which is different from the fixed value c of Maxwell’s theory.
