nopeda, on 10 February 2013 - 11:09 PM, said:
It sounds to me like you got that last part from Star Trek. FTL is always relative to something. So far no one else I've encountered in this forum seems to appreciate the significance of that particular fact, so how could they move on to consider other details about it? Everyone always just takes it for granted that it's relative to this particular planet as if it were the foundation of the universe and not in motion, even though we're moving at a million miles per hour relative to some things.
No, not Star Trek, those ships come out of warp even in orbit of planets without any concern. Braking is as important as acceleration, so I just do now see a nice peaceful exit from sub space like we see on the TV with that sort of energy involved.
People just do not take it for granted, the big disclaimer here being that photons are massless and therefore do abide by rules of physics, and that is being taken into account. Your description seems to treat photons like they have mass. That is bound to cause some confusion at least
nopeda, on 10 February 2013 - 11:11 PM, said:
We know light it slowed by different mediums, but some of us don't feel that space itself is one. I don't believe it "exists" at all. Whether it does or not it's fairly well believe that light's speed remains constant unless something alters it. That means if an object is moving toward the Earth at 2K miles per second, and it emits light moving at 186K miles per second relative TO THE EMITTER, the the light should arrive at this planet at 188K mps relative to Earth because of the combined velocities. Something that lets us know combined velocities ARE significant is the shift in frequency. The question which is the starting line is: Why not also the velocity? Few people can get to the starting line though from my experience. Most somehow can't appreciate the significance of the question, though I don't see how anyone could miss it.
Well, it is true that no evidence for an aether or the more popular term, dark matter, exists, and the very experiments that sought to prove it's existence also showed light remins a constant.
Alright, but again we only have objects with mass to demonstrate the ideals, if we say a car is ravelling downhill at 186K mps, and for instance gravity gives it a push of 2kmps so the vehicle is travelling downhill at 188k mps, (I am not saying this happens, it is just for illustration) when Gravity stops affecting it, mechanics will slow the vehicle back down to 186k mps. If light can be affected in this way, how could it be tested without littering the Universe with sensors to measure the path of a single photon. I cannot say you are "wrong" but observation and calculation do not appear to support a variable speed of light, I am not sure why you suspect this
is the case, or do you feel photons may have mass after all?
nopeda, on 10 February 2013 - 11:22 PM, said:
Photons are light, even when they're in the radio region, microwave, UV, xray and gama ray regions. There is reason to believe gravity has an influence on light, and in fact black holes are thought to be black because of that. But if all that was having influence was different huge influences by gravity from different objects in different places then there would be a variety of different velocities at which light impacts the Earth, not all velocities being the same regardless of what areas of space were passed through. That doesn't mean it's not influenced by gravity from such objects when it get near the. But none the less if we are living in and so far still confined to an adjustment area then that would explain why all light in vacuum that humans have been able to test has been moving at the same velocity...because it's all within the adjustment area.
But using the vehicle model above, it should always go back to the driving force. This is more like Maxwells equations isn't it? Maxwell’s equations led to an apparent paradox or inconsistency in the laws of physics, because it suggested that if one could catch up to a beam of light one would see a stationary electromagnetic wave, which is an impossibility. Einstein then hypothesised that the speed of light actually plays the role of infinite speed in our universe. However, some barrier has to exist to create the fabric of space-time. Otherwise, how do you explain time dilation and length contraction when travelling near
c?