How is it possible to form a rainbow on the clear sky?

You need water droplets (well, it doesn't have to be water, but let's use water). Water is clear. However, water normally comes from clouds, which are not. read more

You need water droplets (well, it doesn't have to be water, but let's use water). Water is clear. However, water normally comes from clouds, which are not. If you wanted to create a rainbow - You could use a fountain or sprinkler to create a mist. Face the mist with the sun behind you. read more

Clear skies and sun is shining. The sun is beginning to go down. I noticed a little past the sun there was a rainbow in a sort of circular shape, very small and it grew faint fast. read more

A rainbow, cloud bow, morning glories, halo, sun dog (parhelion), or any kind of optical arc in the sky involve some form of water or ice interacting with sunlight. read more