2006-10-26 08:12:30 · 3 answers · asked by Dimitri C 1 in Science & Mathematics ➔ Physics
Because water droplets that form the rainbow always bend light by the same amount. No matter which direction you look, you only see the reflection the sun is behind you and just the right angle is formed between you, the sun and the droplet.
2006-10-26 08:44:47 · answer #1 · answered by bubsir 4 · 0⤊ 0⤋
Everything you wanna know about it:
http://en.wikipedia.org/wiki/Rainbow
We don't see a full circle because the earth gets in the way. The lower the sun is to the horizon, the more of the circle we see -right at sunset, we would see a full semicircle of the rainbow with the top of the arch 42 degrees above the horizon. The higher the sun is in the sky, the smaller is the arch of the rainbow above the horizon.
2006-10-26 08:14:52 · answer #2 · answered by Zoila 6 · 1⤊ 0⤋
Because of the way it is formed. It is always a circle about 40 degrees around the anti solar point (the shadow of your head).
2006-10-26 08:52:10 · answer #3 · answered by Dome Slug 3 · 0⤊ 0⤋