The theories of the Planck distribution and Rayleigh scattering both calculate I / I0 so there will be hitherto unknown frequency shifts in Rayleigh scattering and also Raman scattering. These are worked out by calculating I / I0 from the Planck distribution and form the theory of Rayleigh scattering, and equating the results. These shifts are reminiscent of Compton scattering, which is a theory worked out with one photon. Therefore Evans / Morris effects are ubiquotous throughout optics and spectroscopy. I will write up UFT308 and then proceed to Rayleigh scattering combined with the Planck distribution.