Why are rainbows curved?
Rainbow's Secret Circle
Why are rainbows curved?
You've seen them after summer storms — those perfect arcs of color hanging in the sky. But why are rainbows always curved? Why not straight lines, or zigzags, or spirals? The answer is hidden in the shape of something very small.
A rainbow happens when sunlight bounces around inside millions of tiny water droplets floating in the air. Each droplet is a sphere — round like a marble, round in every direction.
