Maybe everyone knew this already but it occured to me just yesterday. Sorry i'm a little slow.

Anyway i have a new theory about the Green Flash, at least its new to me. You know how everyone is always looking for that elusive green flash just as the sun sets. i think it is an after image on your retna. you don't notice the green because it is mixed with the orange from the sun. but as soon as the sun leaves the field the green becomes most apparent and then slowly fades.

anyway, my new theory!!!