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It's got nothing to do with the speed of the observer. It's got to with the referential frame of the observer.Philosophy Explorer wrote: Because I'm talking about the speed of light, not about the speed of the observer.
And I'm not talking about the referential frame of the observer.Obvious Leo wrote:It's got nothing to do with the speed of the observer. It's got to with the referential frame of the observer.Philosophy Explorer wrote: Because I'm talking about the speed of light, not about the speed of the observer.
This is false. When light is refracted through a prism or when it passes through mediumsPhilosophy Explorer wrote:
Since the speed of light is a constant
There is also the small matter of gravity to take into consideration. Although a "gravitational field" cannot be described as a "medium", to a distant observer its affect on light transmission is precisely the same as if it were. Thus when a beam of light from a distant quasar passes through an intervening galaxy then RELATIVE TO THE OBSERVER HERE this beam of light slows down even though it is still observed to be a constant in the galaxy in question. This is because this speed can only be measured in the galaxy in question by using a clock in the galaxy in question and this clock ticks more slowly within this galaxy than it does in the intergalactic wilderness between galaxies. The observer observes this as bent light and this effect is no different from the bent stick in the water illusion we all remember from our high school days. Physics prefers to explain this phenomenon of gravitational lensing in terms of a "curved space" but the physicists have a well-deserved reputation for making their explanations incomprehensible. A "curved space" is a mathematical object and not a physical one.surreptitious57 wrote:This is false. When light is refracted through a prism or when it passes through mediumsPhilosophy Explorer wrote:
Since the speed of light is a constant
that have different densities like air and water then it shall propagate at a slower speed
Only when it travels through the medium of space or of vacuum can it actually do so at c
You missed my opening sentence to this thread: "Light moves at a constant speed of about 186,000 miles/sec. in a vacuum."surreptitious57 wrote:This is false. When light is refracted through a prism or when it passes through mediumsPhilosophy Explorer wrote:
Since the speed of light is a constant
that have different densities like air and water then it shall propagate at a slower speed
Only when it travels through the medium of space or of vacuum can it actually do so at c
That is possible but it can never be determined since light cannot travel between universesPhilosophy Explorer wrote:This can be another reason why light may be moving through another universe ( no aether )surreptitious57 wrote:
Light does not require any thing to travel through since it can do so in vacuum
Not even through a theoretical wormhole?surreptitious57 wrote:That is possible but it can never be determined since light cannot travel between universesPhilosophy Explorer wrote:This can be another reason why light may be moving through another universe ( no aether )surreptitious57 wrote:
Light does not require any thing to travel through since it can do so in vacuum
And although you're now ignoring it, you didn't miss my qualifying statement that this speed is as measured in the referential frame of the observer, which means as measured on the clock of the observer. This is simple relativity and a basic conclusion drawn from GR which any physics undergraduate would be expected to understand and it makes a shitload difference to the meaning of your statement. It means that if you decide to go and live in a black hole then EVERY SINGLE process in your body will slow down, including the sub-atomic particles whizzing around inside your body's atoms. It is these particles which absorb and emit energy which we perceive as light.Philosophy Explorer wrote:You missed my opening sentence to this thread: "Light moves at a constant speed of about 186,000 miles/sec. in a vacuum."surreptitious57 wrote:This is false. When light is refracted through a prism or when it passes through mediumsPhilosophy Explorer wrote:
Since the speed of light is a constant
that have different densities like air and water then it shall propagate at a slower speed
Only when it travels through the medium of space or of vacuum can it actually do so at c
PhilX
Anything can travel through a theory, including logic. Nothing destroys a beautiful theory more comprehensively than a single inconvenient FACT.Philosophy Explorer wrote: Not even through a theoretical wormhole?
Such as B. Russell destroyed Frege's theory of (his) foundation of mathematics.Obvious Leo wrote:Anything can travel through a theory, including logic. Nothing destroys a beautiful theory more comprehensively than a single inconvenient FACT.Philosophy Explorer wrote: Not even through a theoretical wormhole?