Figure 2. Simulated received radiation S(ω) from different directions in a small region of the sky assuming an exponentially expanding universe, and with closer sources assumed to be completely opaque to the radiation from more distant ones in the same direction. The sampled spectrum (black) is virtually indistinguishable from the Planck spectrum (red) also shown

From

Dark Energy, Exponential Expansion, CMB, Wave/Particle Duality All Result from Lorentz-Covariance of Boltzmann’s Transport Equation

Arne Bergstrom

International Journal of Physics. 2014, 2(4), 112-117 doi:10.12691/ijp-2-4-4