Why would'nt this work?
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The compression on the end of the stick wouldn't travel faster than the speed of sound in the stick making it MUCH slower than light.
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You're forgetting the speed at which the shockwave from the compression travels through the stick. I guess it's around the speed of sound in that material, which might be ~2 km/s
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What about the speed of the earth's rotation though, could that fuck up the stick holding?
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You'd still be limited by light speed to transmit the information between the two locations to compare times or indicate they received a signal.
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It'll knock the moon and earth out of orbit!
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With your example, nothing is “moving”.
Imagine a giant wave in the ocean that is almost lined up perfectly parallel to the shore. Imagine the angle that the wave is off by is astronomically small (0.0000000001 degrees off from parallel). Also imagine the shore line is astronomically long (millions of kilometers).
One end of the wave will crash the shore slightly before the other end of the wave at the opposite end of the shore. The difference in time between the two sides of the shore is also astronomically small (so small that not even light could reach the other end in time)
Now let me ask you: did the wave travel faster than the speed of light? Of course not. I think that is a similar analogy to the laser movement concept you described.
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I'm going way way out against the standard model here.
No spacetime, no dark matter or dark energy, not even photons.
Just a '3D big ball of yarn single object universe'.If light is a 'turn of the "stick"', then gravity is how 'the "sticks" are binding the atoms together'.
And so there would not be any gravity waves.
And any measurement of them would then have nothing to do with gravity. -
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That was a really good video!
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Thank you for this. Everything above it was just people saying the stick would move slower than light, nothing about why!
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But will it fold?
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That’s the thing. The math says they’re both correct, and that it depends on the viewpoint of the observer.
I’m inside a car moving at 60 mph. I throw the ball forward (let’s ignore air resistance) at 30 mph.
Me, who’s inside the car, sees the ball move forward at 30 mph.
You, who’s outside the car, sees the ball move at the car’s speed PLUS the throw speed (60 + 30 =90 mph)
So, the ball is moving both at 30 mph and 90 mph. How can that be? It depends entirely upon your reference frame (inside the car? Outside the car? Inside another car moving at 40 mph?). The ball moves at all these speeds, and they are all “correct” within universal terms.
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The photons move from laser to moon and it takes time of light's speed. FTL is not possible in that case. Also the information is transmittes from earth to moon and not from one side of moon to other side of moon
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I was definitely talking about the first scenario, as is mostly everyone else. I know not everyone admits gravity (gravitational attraction) might travel faster than light as in the "sun moving" thought experiment.
I'm not confused, I'm discussing like everybody else.
You linked an article about gravitational waves which must transmit through some sort of gravitational field and they might transmit at approximately c as predicted in general relativity.
What I believe is that gravitational attraction, so the general effect of the field will be felt as if it acts almost instantly, and that does not contradict anything about the waves in that field. Because the waves in that field are not responsible for the attraction. This is similar to how photons do not mediate the magnetic attraction in magnets even though they are electromagnetic waves.
The current theories (which you are pulling from) manage to mathematically explain that in our moving sun thought experiment, the gravitational force coming from the sun appears to "update" instantly as if it's acting from it's actual position without the lag, because of (to my understanding) the curvature of space-time. So I personally can't fight that on mathematical grounds because that's above my understanding. But in the end it doesn't change much of anything to our discussion, because the force of gravity still updates "as if" it was mostly instantaneous and that's the standard model. Meanwhile, gravitational waves do travel at c but are kind of unrelated to the continous force. They are merely fluctuations in that force.
Please keep poking and challenging me at that, I'm still wrapping my head around it and will need better and better sources while I'm hyper focusing on it until I move on lol
