Why do rainbows appear after a rain storm? answer wiki user 03/23/2010 the rainbows usually appear after a rainstorm because when you are at a certain angle with relation with the sun and water. Why do rainbows appear after a storm. After it rains, the air in the atmosphere is filled with raindrops each raindrop acts like a tiny prism if sunlight passes through raindrops at just the right angle, the light is split into an arc of colors with red on the outside of the band and violet on the inside.
Why do rainbows appear after a Storm
