White Rainbow, also known as a Fog Bow, is just like a regular rainbow. It occurs when sunlight shines through water droplets. But because fog droplets are smaller than rain droplets, a lot of colour is lost. When we stand with the sun behind us and look into a bank of fog, the sunlight is refracted by the fog droplets. These being hundreds of times smaller, process light in a different way. The main difference is the diffraction the fog causes, where the light is scattered more than it’s reflected, leaving only the brightest parts of the pattern: the White Fog Bow.
White Rainbow
