????? ? ??? ??? ?????? ??? ??? ? ???, ??? ????? ?? ?? ??? ???? ??? ???? ??? ??? ??? ??? ? ????.The main reason the returning light-weight is most powerful at about 42° is that this is a turning place – light hitting the outermost ring in the fall gets returned at a lot less than forty two°, as does the light hitting the fall nearer to its centr