- #1
Apashanka
- 429
- 15
From the action ∫Ldt =∫ι√|g|d4x where |g| is the determinant of the metric .and ι the lagrangian density.
For gravitational field why is this ι is replaced by the Ricci scaler R which yield field equations in vaccum.(Rij-1/2Rgij)=0
Is it that the lagrangian density corresponding to vacuum is the Ricci scaler??
For gravitational field why is this ι is replaced by the Ricci scaler R which yield field equations in vaccum.(Rij-1/2Rgij)=0
Is it that the lagrangian density corresponding to vacuum is the Ricci scaler??