Recent content by graviphoton

Thank you for your detailed reply, but how come people in motion observing a light source see it travel at different speeds to those stationary ? e.g in Brian Greene's 'The elegant universe' the analogy of people on a train with a light and those at a station , those who were stationary...

Hey, this is my first post of many as I have hundreds of questions! As speed of light is a constant, does it travel from the eye of the observer ? e.g is a stationary person observing light travel away at ≈ 3x108m/s but a person traveling at 1/2 of, c, witnessing it travel 1/2 that speed...