Radiation in cosmology
= Radiation in cosmology
Cosmological radiation has equation of state $P_r=\rho_r/3$ and density scaling $\rho_r\propto a^{-4}$.
= Radiation in cosmology
Cosmological radiation has equation of state $P_r=\rho_r/3$ and density scaling $\rho_r\propto a^{-4}$.