Every once in awhile, a rainbow might cast a fainter second bow that is caused by a double reflection of the sunlight inside the raindrops. This phenomenon of multi-coloured arc is usually seen together with raining clouds. What stumped me a few days ago when I saw it, was that there were no raining clouds! Or maybe there were, but I couldn't see them within my (at least) a 100km radius view of the horizon.
No comments:
Post a Comment