what is general relativity?

[univeral theory]

 

A classical model that explains and quantifies the effects of gravity as being a geometric property of space-time, as opposed to mechanical forces between bodies.

and what does this GR model predicts or explains physically?

Edited July 2, 2013 by univeral theory

[Markus Hanke]

and what does this GR model predicts or explains physically?

 

It models gravitational interactions between bodies.

[univeral theory]

 

It models gravitational interactions between bodies.

 

what is gravitation according to GR?

[Markus Hanke]

 

what is gravitation according to GR?

 

GR basically states that the presence of energy and matter is equivalent to changes in the geometry of space-time, in that this geometry is no longer flat but possesses intrinsic curvature. This curvature manifests as gravity, because two initially parallel-moving test particles, when crossing through a region of space-time with curvature, will start to approach each other ( this is called geodesic deviation, and forms the basis of GR's maths and physics ).

 

So in short - in GR, gravitation is a manifestation of the curvature of space-time itself.

[univeral theory]

 

GR basically states that the presence of energy and matter is equivalent to changes in the geometry of space-time.....So in short - in GR, gravitation is a manifestation of the curvature of space-time itself.

 

thank you markus.

but then what is space-time?