Does Light have a "Ground State"?

[Les Sleeth]

Light when it gains or loses energy, increases or decreases its oscillation rate, and shortens or lengthens its wave length (respectively). Do anyone find it hard to imagine just how fast and short light was circa big bang?

Is it possible, given enough time and expansion of the universe, that radiated light's oscillation rate will so slow, and its wave length will become so stretched, that light will eventually lose its integrity as distinct particles? In other words, will all previously distinct light quanta, in the end, blend into one homogeneous continuum of undifferentiated "ground state" of light?

[mathman]

Current microwave background is at a temperature below 3o Kelvin. As time goes on, it gets lower. It might take forever, but eventually it will get to absolute 0. Also there won't be any more energy sources left.