Is there radiation colder than the CMBR?

[Darryl]

I am wondering from the spectra, or the power curve is it possible to draw conclusions as to how that initial 'oscillation' started?

I hope I can explain what I mean, but if you start an oscillator, from a low energy state it may not achieve its operating frequency instantly, it would probably ramp up to the frequency, so you would have higher power levels in the lower frequencies.

IS the CMB and 'attack' or a 'decay' in nature, did it start at a low energy state and then start, or did it start at a very high energy state and decay.

I know it decays over time, but what about the point it was created, violin bow or guitar pluck?

 

[Drakkith]

Each atom/particle is its own oscillator, so there is no "initial" oscillation. The power curve is a result of the distribution of energy among all the oscillators, which, if graphed, would follow a similar curve as the power curve.