The only difference between red starlight and yellow starlight that I'm aware of is simply that the wavelengths of the photons comprising it are distributed differently.
Correct. Suns come sorta close to being blackbody radiators. Red stars and yellow stars are different, of course, but "red solar radiation" isn't really qualitatively different; red stars still produce ultraviolet, x-, and (iirc) gamma rays, just less of them.
The only difference between red starlight and yellow starlight that I'm aware of is simply that the wavelengths of the photons comprising it are distributed differently.
And in the case red sunlight is actually "more powerful" than yellow. But it's not the
light Superman gets his powers from it's something in the radiation but who knows, it's all deus ex machnia anyway.
Incorrect. A yellow star is emitting somewhat more intense radiation than a red sun. Hotter star is hotter.
What's weird is that red suns introduce a lot of problems for Krypton not related to superpowers. Like, if it's around a red giant, they just don't even exist. It's stupid. (It's a plausible extinction event, but I'm pretty sure even the most conservative Science Council might notice all the oceans evaporating and the entire sky filling with the fiery death throes of their god.) It's surely not around a red supergiant. And if it's around a red
dwarf, and it's a proper planet, and it's well-insolated like Earth, it's tidally locked. If it's a moon around a tidally locked jovian, it's not a planet.
I think Rao is supposed to be a basically Sol-sized red star, which doesn't make sense unless it was artificially cooled. So here's a stupid astronomy question: would throwing a super-jovian into a G-type, Sol-style star reduce its surface temperature for any appreciable amount of time? I guess you could also interfere with the fusion process in some way but I don't think that would actually do anything about the surface temperature for literal epochs. (This is despite what we learned in Star Trek Generations, otherwise the most scientifically literate film ever made.)
I've also seen some talk of Superman under a blue sun. What about Superman under the accretion disk of a black hole? If yellow sunlight is good, and ultraviolet sunlight is better, x-ray sunlight must be the best, right? Bonus points: Soundgarden reference. Awesome.