Derivation of expansion scalar for FRW spacetime - weird observation

  • #51


PeterDonis said:
I see on re-reading post #46 that I didn't make this part of it clear; I was focused on the sign of t and dt instead of the sign of \tau. Apologies if that caused confusion.
No need to apologize, thanks I'll think about it.
 
Physics news on Phys.org
  • #52


Ugh, I have to admit my #6 is both silly and wrong, I simply slipped-up and well, I'm a bit stubborn at times, anyway thank you Peter and Ben for your patience.
 
  • #53


No problem. Glad you see it now.
 

Similar threads

I Observed Redshift from Moving Source: Deriving the Result
Replies
5
Views
1K
A Ricci tensor for Fermi normal coordinates
Replies
1
Views
729
I Principal and Gaussian curvature of the FRW metric
Replies
8
Views
1K
I Invariant Mass-Energy in FRW Spacetime
Replies
19
Views
2K
I Is Scale Factor a Scalar? Sean Carroll Invitation
Replies
12
Views
2K
I Covariant divergence of vector; physical meaning with contracted Tuv
Replies
2
Views
2K
I Kinematic Decomposition for "Rod and Hole" Relativity Paradox
2
Replies
78
Views
6K
Insights Geodesic Congruences in FRW, Schwarzschild and Kerr Spacetimes
Replies
8
Views
3K
A Can We Construct a Coordinate Chart Where Bell Observers Are At Rest?
Replies
11
Views
1K
I Co-Moving Coordinates & Lapse Function N(t) in ADM Decomposition
Replies
8
Views
2K

Hot Threads

Recent Insights

Back
Top