Quote:
Originally Posted by Virgs
Oh please, will you stop and read what you are saying. Where do you get the twice c from? If the sun exploded it would take 8 and a half minutes before the earth where to fling out of orbit - now how does your push gravity explain that!!! I feel that the members here are cutting you quite a lot of slack because they are polite and respectful individuals but your lack of any methodical modelling or explanations that are remotely observable with the world in which we live is starting to get tiring. I appreciate you do not have the maths background but please try and match your idea with some science or reasonable logical thought which will allow us to develop a test for this and if you can not , then stop with the idea that you some how have a greater insight than the true geniuses of physics. Now I re-state that is not a personal attack on you.
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Wow! For something which was not a personal attack, that's pretty full-on and personal!
I do not subscribe to the PUSH model for gravity, but if my basic understanding of the model is correct (please feel free to add/correct Alex) then:
1. Ubiquitous push particles (aka dark energy... let's call them gravitons) are a property of empty space, flowing in all directions, passing through ordinary matter objects, but also exerting a pressure in direct proportion to object mass.
2. When an Object is not in a gravitation field, it experiences equal graviton pressure in all directions, and therefore no net gravitation.
3. When an Object is in the vicinity of a Large Mass, it is partially shielded from gravitons, it experiences a net pressure in that direction. The effect is that the Object experiences a net force (in proportion to its own mass) in the direction of the Large Mass. The apparent force between the Object and the Large Mass is described by Newton's equation for gravitation, with terms having there normal meanings: F = G ( M1 x M1 ) / r^2
4 The PUSH model for gravity does not change the maths from the Newtonian equation, but simply proposes a candidate "mechanism" for the observed effects.
5. In the vicinity of the Sun, the Earth is partially shielded from gravitons in that direction. The net force on the Earth in the direction of the Sun is as per Newton's equation, and enables the Earth to remain in its orbit around the Sun.
6. If the mass of the Sun were no longer available to partially shield the Earth from gravitons in that direction, then the Earth would experience no net force (having equal graviton pressure from all directions), and would therefore continue in a straight line rather than remaining in its orbit.
So on a very basic level, the PUSH model can be visualised. It's when we start to dig deeper that some of its problems start to show.
- where do the proposed gravitons come from?
- by what magic to they interact with matter to impart momentum & kinetic energy?
- can their transferred/lost momentum & energy be observed or tested?
- how can PUSH gravity force inversely proportional to distance?
(makes sense for attractive gravity since spherical area is proportional to r^2, but not for PUSH)
Nonetheless, it may still be possible to test and refine/improve the PUSH model model to better explain and predict observable behaviour. I think it's an
up hill battle myself, but can see the
attraction of the challenge.
