A primary rainbow is the name for the arcs of spectral colour that appear in the presence of strong sunlight, water droplets and an observer. Primary rainbows can be produced by raindrops or anything else that produces a spray of water.
A primary rainbow is the name for the arcs of spectral colour that appear in the presence of strong sunlight, water droplets and an observer. Primary rainbows can be produced by raindrops or anything else that produces a spray of water.