Recent content by profgemelli

Boys listen to this and have a laugh. I have wondered for weeks what this "OP argument" was. I am interested in cosmology and alternative cosmologies, and I believed it had to be some well-known philosophical argument, and searched it on the internet. I found hundreds of citations of the...

Obviously I have no problem to understand that rotation of the Earth is absolute in the framework of Newtonian mechanics, and also in SR. All in all the motion is itself absolute in those frameworks, isn't it? It is the fact that acceleration should be absolute also in GR that conflicts with the...

Again you say that acceleration and rotation are absolute in General relativity. What can I say? This means that I have completely misunderstood einstein's gravitation. Let me go back to textbooks and see you later...

Don't think I don't appreciate your effort to explain me this thing, but I still doubt it is so simple, and I just rely to einstein: since in GR all reference frames are equivalent, the force which acts on the pendulum, as seen by an observed on the surface of the earth, in GR in my opinion...

Yes, in flat spacetime, i.e. in special relativity, there are inertial frames, and the Earth is not inertial, so you can say that the Earth rotates in absolute terms, and so fictional forces like Coriolis are legitimate. Fictional forces are apparent, and appear only in non-inertial frames...

Ok, dipole, quadrupole... this means something to me. Thank you. I also remember the papapetrou's scheme for a spinning particle, which also involves the Riemann tensor, and maybe that could be another way of seeing the Earth: a spinning particle, i.e. a particle which is not a point test...

Thanks for your help, everybody, but I am still trying to understand what Foucaults pendulum measures, according to Einstein gravitation. At the moment, this is my humble reasonment and (probably wrong) conclusion: Earth in a sense is a free falling test particle, so it should travel on a...

Proper acceleration? Wait a moment. In general relativity a particle which is in free fall, follows a geodesics, i.e. its "proper" acceleration (derivative of the unit velocity vector, tangent to the path curve, with respect of the proper time parameter) is zero. So you are not talking about...

Einstein came back to absolute motion? Really? This is new to me! Where and when did he write it?

In the 19th century they believed in the absolute motion and the ether, and they were searching for a scientific proof of the motion of the Earth. When Foucaults experiment was done, people still believing that the Earth was still wasfinally convinced that it moves instead. But it is well...

In any case I am very surprised that LHC thus seems to confirm the standard model, somehow. It seems to me such a complicated and anti-easthetic thing, with too many free parameters... that I have never seen it as a model that could be definitely confirmed or disproven. The discovery of the...

Sorry, I don't know why possible explanations of the anomalous pioneer data should disprove Carmeli's cosmological relativity, which as far as I know is based in an axiomatic way on the geometrization of Hubble's law. Would you please explain it to me? In any case Carmeli is dead, and...

Yes, the slowing of binary pulsar is a proof of the existence of gravitational radiation. But this is in accordance with Cosmological Relativity, Carmeli's theory has gravitational waves, so they subtract energy to the sistem, etc... but CR has them fastly dumping so they cannot be detected...

What a pity that this subject does not arise much interest. I like Carmeli's theory for a number of reasons, e.g. the fact that it does not need dark matter: http://arxiv.org/abs/astro-ph/0511756 and that in its 5D version Gravitational waves are dumped so this is consistent with the fact...

Perhaps, if I am not abusing of your patience, I must try to be more precise in my question. I already knew that most of the physicists don't believe in white holes, probably I don't too, but some scientists have a different opinion. There are relatively few papers on that subject in the...