Sunday 17 November 2013

Gravitation

I have been long perplexed by the notion of gravitation. We are taught of the principles and rules of physics at school at a very young age when we cannot challenge the teacher. Later we just build on this knowledge and work with it in our studies and daily life. We never again give a thought about them.

But sometime in your life you find yourself asking: What is it really? How does that work?

This is how I am with gravitation. I do not know what it is. After some search on the net I realized that eventually no one knows. There are new and new theories but nothing certain.

Gravitons? Or entropic gravity? Yeah why not.

But what if it is something else?

What is the source of gravitation?
I could never buy the idea of force fields, such as gravitational and magnetic force fields. How can a force field exert force? It is even more strange that the force points towards the source of that force, the emitter. How could an emitted particle or radiation force subjects to move backwards to the source of emitter and not away?

I tend to think that there is no such a thing as gravitational field. I do not believe that simple particles or even some kind of radiation (that might build up the field) could deliver force. How could such a weak link bind the Moon to the Earth and make it orbit around it?

All we know is that the Moon certainly knows about the Earth.

What carries the information of gravitation?
I tend to think that there is only an information link between the Moon and the Earth. So some kind of particles or a form of radiation shall deliver the info to each of them.

Like when my wife calls me to dinner. She does not exert force, she does not need to drag me to the table. She just informs me that the dinner is served. I will immediately gravitate towards the dinner table.

Would it be enough just to block the information channel between any subject and the Earth to neutralize the pull towards the centre of our globe? If we can find what is it that delivers the information to my tea cup we could insulate, shield off the cup and it will not fall down and shatter on the floor. My cup will not know about the Earth it will not move towards its centre.

The method then would be analogous to insulating charged particles from each other, or shielding a metal off a magnet. In these cases we manage to block the flow of information (or the "force field", if you like) based on daily practice, although we do not know how these "force fields" work or what carries the information between the charged particles and between the metal and the magnet.

I must note also that the black holes are also good examples. In theory nothing, not even radiation can escape a black hole within the event horizon. Still the universe knows about the black holes, it feels their gravitational pull, therefore, information must be able to escape the black holes. Can the Hawking Radiation be the carrier of gravitational information? Or something else?

Even if we think of the curvature of space-time caused by gravity as Einstein's theory suggests there is still a need of information exchange. Space-time needs to know about the mass that creates gravity (or rather the curvature of space-time) and mass needs to know about the changed curvature of space-time.

How can matter decipher the information?
If there is no force only information than it leads us to the last question: how can matter decipher the information it received? If it were just a pure and brute force than you need only a dumb particle and it will react to it. But if it is a piece of information then it has to be decoded.

That sounds wierd indeed. But hey, why not? We do have our body cells. They do have their way to decode information: just think of the DNA. What if every particle, any matter, radiation in the universe does have a yet unknown decoding system, their own "DNA"? That would explain how matter and energy knows and reacts to the rules of nature and physics. For example: how substances know they must obey to the Laws of Thermodynamics? There must be some kind of built in coding system.

Yeah, one more point: I am not a creatonist.

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