east of Newfoundland imaged by Juerg Alean (site, more
voyage images, Stromboli
online) from the stern of a container ship as it thundered across
©Juerg Alean, shown with permission.
Fogbow form like rainbows by sunlight refraction and reflection in water drops.
Fog droplets are much smaller than raindrops and another process becomes important. Diffraction - interference between light waves - broadens the bow and renders the colours more pastel.
Droplets & diffraction
Fogbows & rainbows