SpaceGazelle wrote:

Cheers SG wil look at those again, I think some new stuff stays less in my head as old stuff was there longer. It's bad but human

I thought you might like this. Special relativity is really quite simple to derive, just remember small t is your time and Tau is their time. And that really is it. All special relativity is just the time dilation, gamma. Everything else comes from this. You can see that the speed limit of the Universe is a simple consequence of geometry, or more precisely Pythagoras. As v approaches c, gamma tends to infinity and a person moving at the speed of light is frozen it time. speed = dist/time means that they are essentially going infinity fast, for them, and they can travel any distance in zero seconds. Although the derivation is easy the consequences of Pythagoras can be a little harder to wrap your head around. It's quite staggering how everything ties together, and when Maxwell united magnetism and electricity this weird constant popped out, and that was c. How can a Universal constant be a speed when all intertial frames are the same? Speed relative to what? And now we know, it's because of right-angled triangles and that speed is the same for everyone, so it really is a constant after all. I try not to dwell on the interconnectedness of all things because it makes me drink too much.