Define Cosmic background radiation or Primal law

Cosmic background radiation: primal glow: The background of radiation is generally in the frequency range of 3 x 10¹¹ to 3 x 10⁸ Hz discovered in space in the year 1965. It is believed to be the cosmologically red-shifted radiation introduced by the big bang itself. Currently it has an energy density in bare space of around 4 x 10^-14 J/m³.

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