If the entire body of the deep underwent nucleosynthesis and energy radiated from every particle in existence, then there ought to be an even distribution of radiation and elementary particles. There's your CMBR.
Detection of the CMBR is taken to be support for the Big Bang Theory, although using the CMBR in this way only amounts to an inductive rationalization of circumstantial evidence to fit a premise.
Let Light Be Nucleosynthesis (LLBN), and the conditions described in Genesis 1:2-3, would cause a cosmic microwave background radiation (CMBR). Therefore, detection of the CMBR proves that Genesis is true.