Posted: Mar 24, 2017 8:48 pm
by crank
newolder wrote:
crank wrote:"Brightness" is a photons per some area thing, isn't it? You'd have the same brightness, but at longer wavelength.

Line-of-sight absorption affects received brightness too. There are models from other measures to help. Ooh - and gravitational lensing may affect some measurements and other stuff that I haven't thought about yet, and...

So it goes.

I understand a lot of that, I was only addressing the brightness/energy question. The more interesting question is how that violates conservation of energy or does it? I saw something that said it did, from a good source, and forgot what , if any, was the explanation.