I'm not sure if Light as a generic term we all use for a band of electromagnetic frequencies visible to the human eye is material or not until it interacts with something that we regard as material. So as I mentioned to you in your post on Dune's topic, here is the next piece of the Speed of Light puzzle and it's relationship to the dimensions of the Earth as I mentioned before. The equivalent number of units of basic 12/7 ratio AE cubits, was stated to be 573,750,000 = the current known value of the Speed of Light. But it's significance also as a Radian value is present as well as this next calculation will demonstrate.
57.375* / 180* = .31875, which is an interesting decimal fraction of what exactly? How about that Old Meter of 39.375 ins. for starters, which multiplied by = 12.55078125 ins. Does this figure look familiar to anyone present here? Of course not,,so let's double it up to 25.1015625 ins. Any guesses now? I won't hold my breath for that long LOL! So lets use 10,000,000 of these units and do the basic divisional calculations of what this figure represents. 251,015,625 ins./ 12 per ft. / 5280 per mile = 3961.736506 Mi. That looks like an interesting Earth radius unit to me,,so let's double it up again as a diameter and use good ol 22/7 seked Pi as the conversion to Earth Circ. And the total is, 24,902.34375 Mi. Hmm! Now where have I seen that figure before,:)