Originally posted by dehammer:
[QUOTE]i know that, but the question was why could you not see light moveing less than light speed since you were already moving at half light. so when your 'measureing stick' is temporely (not temporarily, but thought time) is dialated by the fact that you are feeling the effects of the dialation, the appearance of light still is the speed of light.
since you do not believe you have to read something for content, you missed what was being said.
Because relative to your reference frame you are not moving; but stationary. You can only move relative to another inertial reference frame which moves relative to your reference frame (within which you are stationary). An observer in the other reference frame will be able to observe you as moving with 1/2c. Your experience is that you are stationary and therefore you will keep on measuring light speed as c relative to your reference frame; just as the other observer will, in turn, measure light speed as c within his reference frame (within which he is stationary. Why it is so has always been to me amazing. I believe, however, that it relates to the amount of "bending" of the fourth dimension relative to space. If space-time is Euclidean, change can probably not manifest in such an Euclidean space because changes along the axes are linearly independent. So if the fourth dimension is not bent, one will not be able to differentiate with time; nothing can then change. Maybe, as the Universe expands, the time axis will unbend and the speed of light (far away from massive objects) might change in magnitude; probably going to zero at the end of time.
