Originally Posted by Top_Gunn

There is no such thing as "a 1/4 size model." Is a 1/4 scale model 1/4 the size of the full-scale airplane, or 1/64 the size, or something else? There is no right answer to that question.This has nothing to do with physics, optics, or any other branch of science. It's a question of the meaning of words. "Size" is not a concept used in any science (unlike things like length, width, area, volume, or mass). Your arguments, whatever their merit, have nothing to do with the point I have been making. My original post was not directed at your arguments, which for all I know may be at least partly right or complete BS. But I do know that saying something is "1/4 the size" of something else is meaningless, except in the sense that it means smaller in at least one dimension. Using a term like "size" in a discussion of a supposedly scientific matter is simply silly.