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I'd rather do that than insist that just because I can't understand something means science has it wrong. That's the height of human arrogance and ultimately closed-minded.
originally posted by: Terpene
a reply to: face23785
I'm asking how they changed the negativ acceleration vector?
How fast was the light after it came out of the gas?
As someone pointed out, you're forgetting about time dilation. This effect is negligible for an auto collision, but super important at relativistic velocities.
If an object flew our way with lightspeed, and a photon hit the surface and gets reflected our way wouldn't it have to already know every other relative position and adapt its speed to them?
That was good until you went off the rails with the last sentence. if you are a photon yourself, you have no valid reference frame so relativity can say nothing about what things would look like from your reference frame. In fact it's not difficult to show that relativity would fall apart if you tried to give the photon a reference frame, but only incompetent physicists claim a photon can have a valid reference frame, some don't really understand relativity.
originally posted by: Direne
Let's try to settle the discussion.
All electromagnetic waves travel at the same speed: the speed of light. This is always true, whether you are travelling towards or away from the source. This sounds paradoxical: were you travelling away from the light source at nearly light speed yourself, you would expect that the light would only slowly overtake you; however, it rushes past at light speed itself. It is important to read this carefully because this is counter-intuitive.
If you were riding on a photon and switch on a searchlight, the searchlight will emit a beam that you will never overtake it because the beam is travelling at the speed of light, RELATIVE TO YOU, regardless of you travelling too at the speed of light. Please, retain these words in your mind: relative to you.
The invariance of the speed of light with respect to the speed of source or observer is a result, in part, of distances contracting. Distances and time intervals as recorded by observers at different speeds take on different measures; what is space for one observer is a mix of space and time for another. In the above case (you riding on a photon) common sense fails since independent of how fast you move or in what direction, your relative speed to a light beam is invariant.
It is the fact that c is finite that makes the structure of space and time depend upon our speed; it is because c is finite but large that you normally are unaware of its effects. The lesson is this: when talking about photons, speeds, and positions, always bear in mind that they are all computed RELATIVE TO YOU and that whatever you do, wherever you happen to be, whatever the speed you move at, the speed of light will always be invariant. Even if you were a photon yourself.
Time is not frozen from light's perspective, because light does not have a perspective. There is no valid reference frame in which light is at rest. This statement is not a minor issue that can be approximated away or overcome by a different choice of words. This statement is fundamental to Einstein's theory of Special Relativity, which has been experimentally validated thousands of times over the last hundred years.
originally posted by: Direne
Let's try to settle the discussion.
All electromagnetic waves travel at the same speed: the speed of light. This is always true, whether you are travelling towards or away from the source. This sounds paradoxical: were you travelling away from the light source at nearly light speed yourself, you would expect that the light would only slowly overtake you; however, it rushes past at light speed itself. It is important to read this carefully because this is counter-intuitive.
If you were riding on a photon and switch on a searchlight, the searchlight will emit a beam that you will never overtake it because the beam is travelling at the speed of light, RELATIVE TO YOU, regardless of you travelling too at the speed of light. Please, retain these words in your mind: relative to you.
The invariance of the speed of light with respect to the speed of source or observer is a result, in part, of distances contracting. Distances and time intervals as recorded by observers at different speeds take on different measures; what is space for one observer is a mix of space and time for another. In the above case (you riding on a photon) common sense fails since independent of how fast you move or in what direction, your relative speed to a light beam is invariant.
It is the fact that c is finite that makes the structure of space and time depend upon our speed; it is because c is finite but large that you normally are unaware of its effects. The lesson is this: when talking about photons, speeds, and positions, always bear in mind that they are all computed RELATIVE TO YOU and that whatever you do, wherever you happen to be, whatever the speed you move at, the speed of light will always be invariant. Even if you were a photon yourself.
originally posted by: NobodySpecial268
a reply to: face23785
As someone pointed out, you're forgetting about time dilation. This effect is negligible for an auto collision, but super important at relativistic velocities.
Thanks for replying. 'Time dilation' is another new term for me.
The 'tadpole dish' was when I sorta got the idea of the 'observer's point of view'.
originally posted by: Terpene
a reply to: face23785
So what? after it exits the medium, it resumes light speed?
originally posted by: Terpene
a reply to: Direne
Whenever a science sais thats just how it is, or that's impossiblemy conspiratorial mind tells me there is something more. In this case something beyond the speed of light. Something we are not supposed to "see".
originally posted by: sean
If you could travel the much faster speed of entanglement @ 3e+15m/s, or almost 1/3ly/s; You could reach Alpha Centauri in about 16 seconds.