answersLogoWhite

0

There are basically two schools of thought about gravity, one I shall call the curvature or Einstein model, and the other one I shall call the particle model.

The Einstein model asserts that gravity is a curvature of spacetime and is the one predominately thought in schools, mainly because the particle model is more difficult to explain.

The particle model on the other hand asserts that, just like the other forces of nature, the force of gravity is transmitted via a virtual spin-2 particle called the graviton. The particle model also says that the graviton affects, or couples to, each other particle including other gravitons.

The predictions these models make are the same, because gravitons couple to everything, and to themselves, they can certainly give the same appearance as a theory of bent spacetime because there is no way to distinguish it (because there is nothing that does not couple to the graviton, and thus gravity) from a model with a rigid spacetime but with graviton self-interaction.

In fact using the framework of quantum field theory, one can show that one arises at exactly the same equations using the particle model as when using the curvature model.

The curvature model is older, being the model Einstein used himself, but the particle model seems to put gravity on equal footing as the other three fundamental forces (electromagnetism, weak and strong forces) which is also very pleasing. The particle model, however, has not yet been successfully been merged with the other three forces due to internal inconsistencies.

We have not yet seen a graviton in a particle collider because gravity is extremely weak compared to the other forces (consider a simple magnet able to lift up a piece of iron even with the entire gravity of the Earth pulling on it!) so a graviton would only couple very weakly so it would be very hard to detect. In fact I can probably not overstate how hard it would be.

A graviton couples so weakly that its influence would only become important in particle interactions at very high energies, and it is likely that at that point new physics will also emerge, such as the possible discreteness of space and time for example.

What else can I help you with?

Related Questions

How does gravity bend space-time?

Gravity bends space-time by creating a curvature in the fabric of the universe. Objects with mass, like planets and stars, cause this curvature, which affects the path that other objects, like light, travel through space. This bending of space-time is what we experience as the force of gravity.


Which of the four fundamental forces of nature is responisble for kepping the earth in orbit about the sun?

The force of gravity, the effect of mass on the curvature of the fabric of space time.


Is gravity an exchange?

No. Our best understanding is that gravity is a distortion (curvature) in the fabric of space-time caused by the presence of mass. Mass tells space-time ow to bend and space-time tells mass how to move.


What did Albert Einstein think about gravity?

einstein thinks that gravity is not a force at all.It is the shortest path in space time curvature.according to einstein when ever heavier object like sun in space it curves the space around it and the object like earth moves around it.


What is the relationship between time dilation and gravity, and how does time dilation cause gravity?

Time dilation and gravity are interconnected concepts in the theory of general relativity. According to this theory, gravity is not a force but rather a curvature in spacetime caused by the presence of mass and energy. This curvature of spacetime affects the flow of time, leading to time dilation. Essentially, the stronger the gravitational field, the greater the time dilation experienced by an observer. In other words, time dilation is a consequence of the curvature of spacetime caused by gravity.


What do you call Bending of time and space?

space-time curvature


What is Einstein's big idea?

He really had 2 big ideas. His first one is called Special Relativity (E=MC2). This shows that energy and mass are 2 different forms of the same thing, just like ice and water. It unified mass and energy by showing that they are just two different aspects of one thing. His next big idea was the General Theory of Relativity. This more complicated equation is an extension of Special Relativity and takes gravity into consideration. It shows that gravity is not a force like other forces but rather a consequence of curved space. The equation describes the relationship between space curvature and mass. Basically, more mass = more curvature of space, and thus more apparent gravity.


What is the theory that matter distorts space?

The theory that matter distorts space is known as Einstein's theory of general relativity. According to this theory, massive objects like stars and planets cause a curvature in the fabric of space-time, which we perceive as the force of gravity. This distortion of space-time explains how objects with mass attract each other.


What force acts on space time?

Certainly it appears that gravity does so.


What effect does mass and energy have on space-time?

Mass and energy cause curvature in space-time according to Einstein's theory of general relativity. Objects with mass and energy distort the geometry of space-time around them, affecting the paths that other objects follow in that region. This is why gravity is observed as a force between masses, as objects are attracted towards regions of curved space-time.


Is gravity a dimension?

No, it is an attractive force caused by the interaction of particles with the dimensions of space/time.


What is Albert Einstein's theory of gravity?

Einstein described gravity as a warping of the fabric of space-time itself rather than as a force acting across it. He imagined space as a 3D representation of a thin rubber sheet, and objects placed upon it as creating indentations that draw other objects into them. The greater the mass of the object, the larger the dent, and the greater the curvature of space around the object. This is the founding priciple of his General Theory of Relativity.