cosmological distance duality relation
C44741
concept
The cosmological distance duality relation is a fundamental relation in cosmology that links luminosity distance and angular diameter distance through the simple formula \(D_L = (1+z)^2 D_A\), assuming photon number conservation and standard spacetime geometry.
Instances (1)
| Instance | Via concept surface |
|---|---|
| Etherington reciprocity theorem | — |