On 11 Aug, Philip <joyphil@xxxxxxxxxxx> wrote: > > > > > Greetings Alan, Being a REAL scientists myself...ah....why don't you > > > explain HOW the difference in speed changes the formulas from > > > Newtonian physics to Einsteinian physics at some magical speed? I'm > > > sure the group will enjoy your thesis on this...as would I :-) Steve It's not at some magical speed. Most of Einstein's formulae have a term v^2/c^2 in them, where v is a velocity and c is the velocity of light. At ordinary speeds on the earth, v is so much smaller than c that the expression is so small that it may be neglected, and assumed to be zero. As v approaches the speed of light, the expression is no longer so small that you can neglect it, so you have to take it into account. If v is a normal earth-type velocity, we ignore the term, and Einstein's equations turn into Newton's. Alan