Re: SR Postulate on Speed of Light


Harry wrote:

> Quite, the second formulation encompasses the first:
> If the measured vacuum speed of light is the constant c in any
inertial
> frame, it is by definition independent of the motion of objects in
that
> frame and that includes light sources.

'Scuse me for asking dumb questions:
1. So the measured vacuum speed of light is a constant in an inertial
frame independent of the speed of BOTH the source AND the observer,
correct?
2. Does it follow that the ACTUAL vacuum speed of light in an inertial
frame is also constant, or can't we tell?

.