I have considered both of the understandings of this definition, and I have come to the conclusion that the meaning is that light has a constant velocity in a given medium, thus the example I gave with the sound
In my mind, there are not any theoritical constraints, for e.g. different...
excuse me, some more comments...
I must say that I agree, at a first glance (that is, without making any mathematical calculations) that this is a possibility, maybe the expansion has ceased, although we can not see it already, as we can only see what happened in the past (light has finite...
I have not any knowledge of dark eneyrgy, so I will not comment on this, at the moment, at least... As for the first push, I envisage this as an explosion, in which some small parts are going more far than some others... Then, in the empty space, at some time the distance between the heavy and...
Hehe, you are right that I did somehow missed the heart of your question... which is I believe that "It only makes sense to me that if the universe began at a singularity of energy, it would end that way as well" and similarly "isn't it valid to believe that the Universe goes through cycles". My...
Hi there... Just from the looks of things, it seems that galaxies are basically the result of an explosion of a self-rotating object, hence the helicoid arrangement-shape... That brings me in mind, as I have read, black holes, which explode under their gravity etc. What that means, is that...
...And something else, please let me clarify one thing: When I am saying that the speed of sound is the same, no matter if you are inside an airplane or walking, I am just referring to the speed of those two; the air, as a medium, is supposed being homogeneous and not moving... And then, that...
Hi Darktangent1... This is my first, so ...hi in general :) Well, I must say that I did not follow your example fully, but the answer might well be that when you are talking about the speed of light being the same in all inertial frames, what that basically means is that the light has its own...