John M, doug, JC.
That's the heart of nature. When waves meet waves they both 'superpose' and interact, so the less dominant can be influenced. A (counter wound) toroid is a closed wave form with much power. (I agree doug, condensed as a twin vortex 'fermion pair' from the 'continuum', but perhaps most only for a nanosecond!).
Now was it JC or Akimbo who asked this and I forgot to respond? But when a fluctuation (wave), which has an optical axis normally normal to it's propagation direction, interacts with the torus it will be both helped on it's way (so toroid spin derives local c) AND it's axis on re-emission slightly changed due to 2 asymmetries;
A; The orientation of the torus (a local EM field function), and
B; The relative motion of the torus through the propagation medium (or wrt the last re-emission). OAM is involved but we won't got into that here.
Plasma n=1 means there's no 'delay', but the effect is a slight rotation (see last years essay, including the experimental evidence) of the optical axis which is 'apparent source position', AWAY from the causal wavefront plane.
If space is expanding AT ALL then each ion is moving slightly away from us, giving a tiny redshift at each interaction, but accumulating. (We also don't know the effect of the expanding dark energy 'continuum' on the waves!). However this discrete field 'DFM' description incorporates, so can explain, pretty well all phenomena, including the anomalous and poorly understood ones, a quick list includes;
Dark energy, dark matter, refraction, Faraday rotation, elliptical polarity, birefringence, annihilation, the kSZ effects and KRR, the LT, optical breakdown, special relativity, curved space-time, quantised gravity/GR, QM's Copenhagen interpretation, the Dynamic Casimir effect, virtual electrons, galaxy bars and cyclic evolution, pre 'big bang' conditions, the Kerr effects etc etc. (the list goes on). Each of those is derived in the DFM papers. Unfortunately the foundational mechanism is slightly different to current doctrine, with significant affect right across science, so the model is probably quite wrong. Does it sound correct to you?
Many perceive a new basis is needed, but can't see beyond the old. When we consider how many text books would need replacing and how many professors would need to throw away much of what they know, I suspect the ontology has almost zero chance of being assimilated let alone found correct (or at least not until ~2020). Perhaps that's a good thing. What do you think?
Peter