Think in one day, maybe not in our lifetime, they will have a real formula that has been thought about with men of knowledge, that takes into account diameter, rate of expansion, size of expansion dependent on speed and media, velocity, wieght to give an accurate number. It might happen. I work in fiber optics these days, and we have an extremely complicated nonlinarity formula that takes a super computer/Sun machine to run to predict the outcome of light traveling 1000's of miles.

The reason we might not come up with a fomula in our lifetime, is one, no money in it, two, do we really need it other than chewin the fat here. I mean, we have something better, real life data and 100's of years of it.