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Nenad
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Has any reaserch facility in the world developed a way to create gravity waves, sizable ones?
Regards,
Nenad
Regards,
Nenad
I didn't mean to cast doubt on whether they exist or not, but as you yourself say, physicists are only "fairly confident" of their existence. The reason they think they exist is because all theoretical models currently predict them, and there's no reason to think such models need to be altered, so, yes, there is a lot of confidence of their existence. But we can't know for sure whether they exist or not until we do detect them, and up until now we have not.Vast said:I think you’ll find that physicists are fairly confident that gravitational radiation exists.
We've been detecting electromagnetic radiation ever since the first creature evolved eyes, and it took us until Edison to manufacture it; well, ok, that's not true, we've known how to make fires for quite a while, but we had eyes way before that, so you get my point. It's kind of hard to create something you can't detect. The problem is gravity is extremely weak compared to electromagnetism (and, well, anything), so it's taken us this long to build detectors that theory predicts will be good enough to detect strong sources of gravitational radiation.Nenad said:Well, why would only large events such as novas and black holes be the only source for gravity waves. There is no actual theoretical way that physicists can manipulate spacetime yet?
εllipse said:there is a lot of confidence of their existence.
εllipse said:I didn't mean to cast doubt on whether they exist or not, but as you yourself say, physicists are only "fairly confident" of their existence. The reason they think they exist is because all theoretical models currently predict them, and there's no reason to think such models need to be altered, so, yes, there is a lot of confidence of their existence. But we can't know for sure whether they exist or not until we do detect them, and up until now we have not.
Nenad said:.... The article stated that the US government already had technology consisiting of 3 cylindrical stuctures that can do so. The article also says that the technology....was obtained from a crashed alien spacecraft. ...
haushofer said:I have a question about grav.waves. I've read how one deduces the wave-equation for gravitation. This is done by means of perturbation on the metric( g-->g+h, with g the Minkowski-metric etc). So you assume a weak gravitational field. Then you choose a gauge ( Fock-gauge ) et voila, a wave-equation. This is for example described by d'Inverno, or Carroll.
But, how does one derives a wave equation if you're stuck with a strong grav.field, and perturbation isn't any help?
But, how does one derives a wave equation if you're stuck with a strong grav.field, and perturbation isn't any help?