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Rainbows can be caused by many forms of airborne water. These include not only
rain, but also mist, spray, and airborne dew.
That's the first requirement ... the weather conditions: Liquid water droplets
in the air.
But that doesn't guarantee a rainbow. Here's what else you need:
-- The sun, shining in a clear sky, standing less than 42 degrees above
the horizon, behind you. If more than 42 degrees high, none of a rainbow
can be above the horizon.
-- From where your head is, the clear sun and the watery air must be
in exactly opposite directions.
Wiki User
∙ 12y ago
Wiki User
∙ 12y agono, a rainbow is what happens when light energy hits evaporated water particle in the air. the light is scattered and bent, causing the colors you see.
Wiki User
∙ 11y agoThere must be water droplets suspended in the air, the sun must be shininng on them from behind, and the sun must be at a certain angle.
Wiki User
∙ 11y agoBasically, as long as the sun shines through bits of water in the air you'll see a rainbow, so if it's not too windy, and bright enough to see into the distance you're good.
Wiki User
∙ 11y agocolors
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