It's worth noting here that "space expansion/acceleration" claims are the single most flagrant violation of the conservation of energy laws in the universe.
In any "tired light"/inelastic scattering scenario, any momentum that is lost by the photon is gained by the plasma medium. Energy is simply transferred from the photon, to the plasma medium. The conservation of energy laws are entirely consistent with this "interpretation" of the photon redshift phenomenon.
On the other hand, "space expansion", not to mention "space acceleration", are a *gross* violation of the conservation of energy laws.
Without any form of magical "space expansion", the distance between any two objects represents a form of *potential* energy which can be converted into particle kinetic energy by allowing the two particles of mass to attract one another.
Even if we add movement to the particles in question, we simply add an initial kinetic energy component to the mix, but again, all the energy in conserved in some form or another, either potential or kinetic energy.
When however astronomers start adding "space expansion" to the equations, that increase of potential energy is not offset by anything, particularly when you start adding in "space acceleration" to boot, from a source of energy that magically remains constant over multiple exponential changes in volume no less! Come on.
The whole "redshift is caused by space expansion/acceleration" claim doesn't even jive with the known laws of physics, specifically the conservation of energy laws, one the oldest and most "tested" laws of physics that we know of.
Why in the *universe* would anyone prefer a concept that *violates* the known laws of physics by adding supernatural elements over a perfectly good *empirical* explanation for redshift that is entirely consistent with the known laws of physics? Edwin Hubble preferred a tired light explanation to cosmological redshift for a very good reason!
RC has empirical physics turned on it's head.
The real title of this thread should be why "space expansion/acceleration" is an invalid interpretation of cosmological redshift.