quote: One easy way to test the idea that the speed of light might be affected by the velocity of an object is to "ping" a spacecraft in orbit around a planet such as Mars, with the transmit signals sent alternatively from each side of the earth, so that in one case the speed of earth's spin adds to the signal
quote: I do believe you can see the same effect using the speed of sound. No matter how fast you go, you won't make sound travel any faster
quote: Light and sound have many similar properties. They are both waves. Neither wave can be accelerated by physically moving the emitter. Both can be used to convey the passage of time. Both experience frequency acceleration and deceleration depending on the relative speed/direction of the emitter and the receiver
quote: I don't think it slows down. It only appears to.
quote: We don't really know this (light not requiring a medium) for certain.
quote: In any event, my observation here is that one cannot affect the speed of a sound wave.
quote: However, if you listen to the Doppler Effect, by listening to an ambulance for instance, you'll notice that there are more oscillations as it approaches over a period of, say, ten seconds, than when it leaves. Thus, time is compressed, albeit, to the ear. I am saying that light does the same thing to the eye.
quote: The experiment done with the rocket could easily be explained by the effect that gravity has on photons.
quote: There is also the fact that, relatively speaking, it doesn't matter which object is expending energy to achieve a difference in velocity. Relatively speaking, if you sit on either the rocket or in the chair, it's not going to make a difference.
quote: if we had a different medium in which to observe both train and ball, than light, we would see the ball exceed the speed of light.