- #1
birdhen
- 35
- 0
Hi,
I have been looking all over on the internet and I can't find out how the action is derived. I know it is used to derive the field equations, but why does it look the way it does? Why use the determinant of the metric, where does the 1/(16 pi G) come from?
Any help would be great,
thanks!
I have been looking all over on the internet and I can't find out how the action is derived. I know it is used to derive the field equations, but why does it look the way it does? Why use the determinant of the metric, where does the 1/(16 pi G) come from?
Any help would be great,
thanks!