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 Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...The Space and Astronomy Agora Re: ((space)) Time Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response ToPosted by Robert M. Owen on December 5, 1998 09:13:11 UTC

: : If i have two light-source, A and B. : : A send light C1 and B send light C2.

: : B.....C2.....C1.....A

: : What happens when light meets?

: : B.......C3........A.

: : C1+C2 join together, and result is C3.

: : What is speed of C3?

: what do you mean, what is the speed of C3?

: If i understand what your asking, your saying : that when two light beams are aimed at eachother : and they meet; what is the speed at the meeting : point?

: the speed of two passing beams is irrelevant. : however, it is more interesting to note that : the observed velocity of light passing by, while : traveling the opposite direction, (at or near the : speed of light), will appear that the light : passing by me is not the sum of my velocity : and the light passing. But rather the light passing : by would appear the normal velocity of lightspeed. : This is relativity.

Indeed-- u'=(u+v)/(1+uv/c2) {according to the STR) Thus, as u=v=c, u'=(u+v)/2=c ergo de facto-- both beams will go towards one another at the speed of light -- c. Einstein made his own conclusions due to this numeric calculations on 1905-- the result was the Special Theory of Relativity... A question worthwhile.