Thanks for the clarifications
Peter Wilson.
Earlier in this thread you said:
Quote:
Is dark energy causing the universe to expand? No, it is "light energy." More specifically, radiation eneregy in all forms (radio waves to gamma rays; neutrinos; gravitational waves; & cosmic rays). Visible matter radiates energy, which is why it is visible, and this energy drives the expansion, according to the principle of Conservation of Energy.
In other words, Dark Energy is light energy!
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... and in your clarification you acknowledged that there's "no new physics" in your idea (well, that's my summary).
Perhaps a first step to testing your idea would be to find out how much 'light energy' there is, throughout the universe?
Let's start with our solar system. An utterly trivial fraction of the solar system is occupied by stuff that's opaque to (most) electromagnetic frequencies - TeV (and higher energy) gammas from AGNs are detected smashing up (Earth's) atmosphere molecules, COMPTON detected lots of gammas of lesser energies (from even further away), XMM-Newton regularly produces lovely pictures of distant galaxies, ... and so on. There are, of course, some obstacles - Jupiter, the Sun, and the IPM below the plasma frequency, but 'light' finds our solar system essentially empty.
So we can add up all the photons, of all the frequencies, that come from all over the sky, to see how much 'light energy' there is. Right?
What would such an investigation conclude? (An OOM - order of magnitude - answer would be just fine).