I'll disagree, the warm is radiating and therefore finds the cold substance.We already covered this a while ago and you must have forgotten:I have been telling them for pages...actually since I got here..spontaneously is the key word...and spontaneously is speaking to the so called back radiation that they claim is coming back to the surface of the earth.
The cosmic ray background (CRB) was discovered with a radio telescope. The CRB is a cold 2.725 deg K. Radio telescopes are at ambient outdoor temperatures, averaging 15 deg C. The very cold radiation from the CRB must strike the much warmer parabola dish in order for it to strike a detector at the focal point.
This illustrates that photons from a cold substance can strike a much warmer substance and be detected to have done so.
I'll disagree, the warm is radiating and therefore finds the cold substance.
How does the "warm radiating" measure the temperature of the Universe?