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Number of Results: 1 Search : luminosity distance

luminosity distance apast-e tâbandegi Fr.: distance de luminosité 1) Distance derived by comparison of → L/4πS)^{1/2}. 2) In cosmology, the → expansion of the Universe
results in a diminution of the photon flux and the above
equation fails. The reason is that for a homogeneous
and isotropic Universe (→ Robertson-Walker metric),
the luminosity decreases by a factor (1 + z)^{4}.
Therefore, the luminosity distance is related to the
→ angular diameter distance (D_{A})
by:
D_{L} = (1 + z)^{2}.D_{A}.→ |